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999999 (number)

← 99999 100000 100001 →
Cardinal one hundred thousand
Ordinal 100000th
(one hundred thousandth)
Factorization 25× 55
Roman numeral C
Unicode symbol(s)
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 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 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".


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