It is a happy number.
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a nialpdrome in base 10.
2100000 is an apocalyptic number.
100000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123039).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
100000 is an frugal number, since it uses more digits than its factorization.
100000 is an evil number, because the sum of its binary digits is even.
The square root of 100000 is about 316.2277660168. The cubic root of 100000 is about 46.4158883361.
The spelling of 100000 in words is "one hundred thousand", and is thus an iban number.