720720 (number)

← 99999 100000 100001 →
List of numbers — Integers ← 100 101 102 103 104 105 106 107 108 109
Cardinal	one hundred thousand
Ordinal	100000th (one hundred thousandth)
Factorization	25× 55
Greek numeral	${\displaystyle {\stackrel {\iota }{\mathrm {M} }}}$
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

100,000 (one hundred thousand) is the natural number following 99,999 and preceding 100,001. In scientific notation, it is written as 10⁵.

In India, Pakistan and South Asia, one hundred thousand is called a lakh, and is written as 1,00,000. 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.

In Cyrillic numerals, it is known as the legion (легион): or .

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.

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