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

Terms for 100,000

In Bangladesh, 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 (all saen), and ức respectively. The Malagasy word is hetsy. In the Netherlands, a 'ton' is a colloquialism for a denomination of 100.000 monetary units. In the guilders period a ton would denote 100.000 guilders. With the introduction of the euro, a ton would come to mean 100.000 euros. The usage is mostly limited to the financial sphere and the buying and selling of houses. It is not used in official settings because of the ambiguity with commonly used metric tonne. While usage is common in the Netherlands, it sees almost no use in Belgium. In Cyrillic numerals, it is known as the legion : or.

Values of 100,000

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 paleoclimatology, the 100,000-year problem is a mismatch between the temperature record and the modeled incoming solar radiation. In**** the Irish language****,**** **** is**** a popular greeting**** meaning "a hundred**** thousand**** welcomes****".

Selected 6-digit numbers (100,001–999,999)

100,001 to 199,999

200,000 to 299,999

300,000 to 399,999

400,000 to 499,999

500,000 to 599,999

600,000 to 699,999

700,000 to 799,999

800,000 to 899,999

900,000 to 999,999

Prime numbers

There are 9,592 primes less than 105, where 99,991 is the largest prime number smaller than 100,000. Increments of 105 from 100,000 through a one million have the following prime counts: In total, there are 68,906 prime numbers between 100,000 and 1,000,000.