One hundred thousand (100000) is the natural number following 99999 and preceding 100001. In India, one hundred thousand is called a lakh.
In scientific notation, it is written as 105.
In astronomy, 100,000 metres, 100 kilometres, or 100 km (62 miles) is the altitude at which the Federation Aeronautique Internationale (FAI) defines spaceflight to begin.
Selected 6-digit numbers (100001 - 999999)
- 100255 - Friedman number
- 100525 - Friedman number
- 107777 - smallest number requiring 16 syllables in English
- 103680 - highly totient number
- 103823 - nice Friedman number
- 105664 - harmonic divisor number
- 111111 - repunit
- 111777 - smallest number requiring 17 syllables in English
- 113634 - Motzkin number
- 117649 = 7^6
- 117800 - harmonic divisor number
- 120284 - Keith number
- 120960 - highly totient number
- 121393 - Fibonacci number
- 127777 - smallest number requiring 18 syllables in English
- 127912 - Wedderburn-Etherington number
- 129106 - Keith number
- 131071 - Mersenne prime
- 131072 = 2^17 (power of two)
- 142857 - Kaprekar number; Harshad number
- 147640 - Keith number
- 148149 - Kaprekar number
- 156146 - Keith number
- 161051 = 11^5
- 161280 - highly totient number
- 167400 - harmonic divisor number
- 173600 - harmonic divisor number
- 174680 - Keith number
- 177147 = 3^11
- 177777 - smallest number requiring 19 syllables in English
- 181440 - highly totient number
- 181819 - Kaprekar number
- 183186 - Keith number
- 187110 - Kaprekar number
- 196418 - Fibonacci number
- 207360 - highly totient number
- 208495 - Kaprekar number
- 222222 - repdigit
- 237510 - harmonic divisor number
- 241920 - highly totient number
- 242060 - harmonic divisor number
- 262144 = 2^18, power of two
- 293547 - Wedderburn-Etherington number
- 298320 - Keith number
- 310572 - Motzkin number
- 317811 - Fibonacci number
- 318682 - Kaprekar number
- 329967 - Kaprekar number
- 332640 - harmonic divisor number
- 333333 - repdigit
- 333667 - unique prime
- 351352 - Kaprekar number
- 355419 - Keith number
- 356643 - Kaprekar number
- 360360 - harmonic divisor number
- 362880 = 9!, highly totient number
- 371293 = 13^5
- 390313 - Kaprekar number
- 390625 = 5^8
- 444444 - repdigit
- 461539 - Kaprekar number
- 466830 - Kaprekar number
- 483840 - highly totient number
- 499500 - Kaprekar number
- 500500 - Kaprekar number
- 514229 - Fibonacci number
- 524287 - Mersenne prime
- 524288 = 2^19, power of two
- 531441 = 3^12
- 533170 - Kaprekar number
- 539400 - harmonic divisor number
- 555555 - repdigit
- 666666 - repdigit
- 676157 - Wedderburn-Etherington number
- 694280 - Keith number
- 695520 - harmonic divisor number
- 725760 - highly totient number
- 726180 - harmonic divisor number
- 753480 - harmonic divisor number
- 777777 - repdigit
- 823543 = 7^7
- 832040 - Fibonacci number
- 853467 - Motzkin number
- 888888 - repdigit, smallest number requiring 20 syllables in English
- 925993 - Keith number
- 950976 - harmonic divisor number
- 967680 - highly totient number
- 999999 - repdigit
