805012100 has 36 divisors (see below), whose sum is σ = 1750864500. Its totient is φ = 321269760.

The previous prime is 805012097. The next prime is 805012127. The reversal of 805012100 is 1210508.

It can be written as a sum of positive squares in 6 ways, for example, as 2876416 + 802135684 = 1696^2 + 28322^2 .

It is a super-2 number, since 2×805012100² = 1296088962292820000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35936 + ... + 53864.

It is an arithmetic number, because the mean of its divisors is an integer number (48635125).

Almost surely, 2^805012100 is an apocalyptic number.

It is an amenable number.

805012100 is an abundant number, since it is smaller than the sum of its proper divisors (945852400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

805012100 is a wasteful number, since it uses less digits than its factorization.

805012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18392 (or 18385 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 805012100 is about 28372.7351519024. The cubic root of 805012100 is about 930.2524076903.

Adding to 805012100 its reverse (1210508), we get a palindrome (806222608).

The spelling of 805012100 in words is "eight hundred five million, twelve thousand, one hundred".