100000 (number)

← 99999 100000 100001 →
List of numbers — Integers ← 0 10^1 10^2 10^3 10^4 10^5 10^6 10^7 10^8 10^9
Cardinal	one hundred thousand
Ordinal	100000th (one hundred thousandth)
Factorization	2^5× 5^5
Roman numeral	C
Unicode symbol(s)	ↈ
Binary	110000110101000002
Ternary	120020112013
Quaternary	1201222004
Quinary	112000005
Senary	20505446
Octal	3032408
Duodecimal	49A5412
Hexadecimal	186A016
Vigesimal	CA0020
Base 36	255S36

One hundred thousand (100,000) is the natural number following 99999 and preceding 100001. In scientific notation, it is written as 10⁵.

Terms for 100000

In India, Pakistan and South Asia, one hundred thousand is called a lakh. The Thai, Lao, Khmer and Vietnamese languages also have separate words for this number: แสน, ແສນ, សែន [saen] and ức respectively. No other major language has a special word for this number, preferring to refer to it as a multiple of smaller numbers.

Values of 100000

In astronomy, 100,000 metres, 100 kilometres, or 100 km (62 miles) is the altitude at which the Fédération Aéronautique Internationale (FAI) defines spaceflight to begin.

In the Irish Language, céad míle fáilte (pronounced: Irish pronunciation: [ceːd̪ˠ ˈmʲiːlʲə ˈfˠaːlʲtʲə]) is a popular greeting meaning "A Hundred Thousand Welcomes".

In piphilology, one hundred thousand is the current world record for the number of digits of pi memorized by a human being.

Selected 6-digit numbers (100001–999999)

• 100003 – smallest 6-digit prime number
• 100255 – Friedman number^[1]
• 101101 – smallest palindromic Carmichael number
• 101723 – smallest prime number whose square is a pandigital number containing each digit from 0 to 9
• 102564 – The smallest parasitic number
• 103680 – highly totient number
• 103769 – the number of combinatorial types of 5-dimensional parallelohedra
• 103823 – nice Friedman number
• 104723 – the 9,999th prime number
• 104729 – the 10,000th prime number
• 104869 – the smallest prime number containing every non-prime digit.
• 105664 – harmonic divisor number
• 110880 – highly composite number
• 111111 – repunit
• 111777 – smallest natural number requiring 17 syllables in American English, 19 in British English
• 113634 – Motzkin number for n = 14
• 114689 – prime factor of F₁₂
• 115975 – Bell number
• 116281 = 341^2 square number, centered decagonal number, 18-gon number.
• 117067 – first prime vampire number
• 117649 = 7⁶
• 117800 – harmonic divisor number
• 120284 – Keith number
• 120960 – highly totient number
• 121393 – Fibonacci number
• 124000 – number of Islamic prophets
• 127777 – smallest natural number requiring 18 syllables in American English, 20 in British English
• 127912 – Wedderburn–Etherington number
• 128981 – Starts the first prime gap sequence of 2, 4, 6, 8, 10, 12, 14
• 129106 – Keith number
• 131071 – Mersenne prime
• 131072 = 2¹⁷
• 131361 – Leyland number
• 134340 – Pluto's minor planet designation
• 135137 – Markov number
• 142129 = 377², square number, Dodecagonal number
• 142857 – Kaprekar number, Harshad number smallest cyclic number in decimal.
• 144000 – number with religious significance
• 147640 – Keith number
• 148149 – Kaprekar number
• 156146 – Keith number
• 161051 = 11⁵
• 161280 – highly totient number
• 166320 – highly composite number
• 167400 – harmonic divisor number
• 173600 – harmonic divisor number
• 174680 – Keith number
• 174763 – Wagstaff prime
• 177147 = 3¹¹
• 177777 – smallest natural number requiring 19 syllables in American English, 21 in British English
• 178478 – Leyland number
• 181440 – highly totient number
• 181819 – Kaprekar number
• 183186 – Keith number
• 187110 – Kaprekar number
• 195025 – Pell number, Markov number
• 196418 – Fibonacci number, Markov number
• 196883 – the dimension of the smallest nontrivial irreducible representation of the Monster group
• 196884 – the coefficient of q in the Fourier series expansion of the j-invariant. The adjacency of 196883 and 196884 was important in suggesting monstrous moonshine.
• 207360 – highly totient number
• 208012 – Catalan number
• 208335 – the largest number to be both triangular and square pyramidal
• 208495 – Kaprekar number
• 221760 – highly composite number
• 222222 – repdigit
• 237510 – harmonic divisor number
• 241920 – highly totient number
• 242060 – harmonic divisor number
• 248832 – the smallest fifth power that can be represented as the sum of only 6 fifth powers.
• 261119 – Carol number
• 262144 = 2¹⁸; exponential factorial of 4; a superperfect number
• 262468 – Leyland number
• 263167 – Kynea number
• 268705 – Leyland number
• 274177 – prime factor of F₆
• 277200 – highly composite number
• 279936 = 6⁷
• 280859 – a six-digit prime number whose square (algebra) is tridigital.
• 293547 – Wedderburn–Etherington number
• 294685 – Markov number
• 298320 – Keith number
• 310572 – Motzkin number
• 317811 – Fibonacci number
• 318682 – Kaprekar number
• 326981 – alternating factorial
• 329967 – Kaprekar number
• 332640 – highly composite number; harmonic divisor number
• 333333 – repdigit
• 333667 – sexy prime and unique prime
• 333673 – sexy prime
• 333679 – sexy prime
• 351352 – Kaprekar number
• 355419 – Keith number
• 356643 – Kaprekar number
• 360360 – harmonic divisor number; the smallest number divisible by all of the numbers 1 through 15
• 362880 = 9!, highly totient number
• 370261 – first prime followed by a prime gap of over 100
• 371293 = 13⁵
• 389305 – self-descriptive number in base 7
• 390313 – Kaprekar number
• 390625 = 5⁸
• 397585 – Leyland number
• 409113 – sum of the first nine factorials
• 422481 – smallest number whose fourth power is the sum of three smaller fourth powers
• 423393 – Leyland number
• 437760 to 440319 – any of these numbers will cause the Apple ][+ and Apple //e computers to crash to a monitor prompt when entered at the Basic prompt, due to a short-cut in the Applesoft code programming of the overflow test when evaluating 16 bit numbers.^[2] Entering 440000 at the prompt has been used to hack games that are protected against entering commands at the prompt after the game is loaded.
• 444444 – repdigit
• 461539 – Kaprekar number
• 426389 – Markov number
• 466830 – Kaprekar number
• 470832 – Pell number
• 483840 – highly totient number
• 498960 – highly composite number
• 499393 – Markov number
• 499500 – Kaprekar number
• 500500 – Kaprekar number, sum of first 1000 integers
• 509203 – Riesel number
• 510510 – the product of the first seven prime numbers, thus the seventh primorial
• 514229 – Fibonacci prime, Markov number
• 524287 – Mersenne prime
• 524288 = 2¹⁹, power of two
• 524649 – Leyland number
• 531441 = 3¹²
• 533169 – Leyland number
• 533170 – Kaprekar number
• 539400 – harmonic divisor number
• 548834 – equal to the sum of the sixth powers of its digits
• 554400 – highly composite number
• 555555 – repdigit
• 604800 – number of seconds in a week
• 646018 – Markov number
• 665280 – highly composite number
• 666666 – repdigit
• 676157 – Wedderburn–Etherington number
• 678570 – Bell number
• 694280 – Keith number
• 695520 – harmonic divisor number
• 720720 – superior highly composite number; colossally abundant number; the smallest number divisible by all the numbers 1 through 16
• 725760 – highly totient number
• 726180 – harmonic divisor number
• 742900 – Catalan number
• 753480 – harmonic divisor number
• 765623 – emirp, Friedman number 5⁶ × 7² − 6 ÷ 3
• 777777 – repdigit, smallest natural number requiring 20 syllables in American English, 22 in British English
• 823543 = 7⁷
• 832040 – Fibonacci number
• 853467 – Motzkin number
• 873612 – 1¹ + 2² + 3³ + 4⁴ + 5⁵ + 6⁶ + 7⁷
• 888888 – repdigit
• 925765 – Markov number
• 925993 – Keith number
• 950976 – harmonic divisor number
• 967680 – highly totient number
• 999983 – largest 6-digit prime number
• 999999 – The divisibility of this number by 7 and by 13 accounts for the fact that rational numbers with those denominators have 6-digit repetends when expressed in decimal form.

References

1. "Problem of the Month (August 2000)". Retrieved 2013-01-13.
2. http://www.txbobsc.com/scsc/scdocumentor/D912.html Disassembled ROM. See comments at $DA1E.