100810 has 16 divisors (see below), whose sum is σ = 192456. Its totient is φ = 37888.

The previous prime is 100801. The next prime is 100811. The reversal of 100810 is 18001.

It can be written as a sum of positive squares in 4 ways, for example, as 94249 + 6561 = 307^2 + 81^2 .

It is a super-2 number, since 2×100810² = 20325312200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (100811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127 + ... + 466.

2¹⁰⁰⁸¹⁰ is an apocalyptic number.

100810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100810 is a deficient number, since it is larger than the sum of its proper divisors (91646).

100810 is a wasteful number, since it uses less digits than its factorization.

100810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 100810 is about 317.5059054569. The cubic root of 100810 is about 46.5408743773.

Adding to 100810 its reverse (18001), we get a palindrome (118811).

The spelling of 100810 in words is "one hundred thousand, eight hundred ten".