812985125 has 16 divisors (see below), whose sum is σ = 1031247984. Its totient is φ = 639720000.

The previous prime is 812985113. The next prime is 812985161. The reversal of 812985125 is 521589218.

It can be written as a sum of positive squares in 8 ways, for example, as 403246561 + 409738564 = 20081^2 + 20242^2 .

It is not a de Polignac number, because 812985125 - 2⁴ = 812985109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45686 + ... + 60935.

It is an arithmetic number, because the mean of its divisors is an integer number (64452999).

Almost surely, 2^812985125 is an apocalyptic number.

It is an amenable number.

812985125 is a deficient number, since it is larger than the sum of its proper divisors (218262859).

812985125 is a wasteful number, since it uses less digits than its factorization.

812985125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106697 (or 106687 counting only the distinct ones).

The product of its digits is 57600, while the sum is 41.

The square root of 812985125 is about 28512.8940130601. The cubic root of 812985125 is about 933.3134686107.

The spelling of 812985125 in words is "eight hundred twelve million, nine hundred eighty-five thousand, one hundred twenty-five".