812865104 has 10 divisors (see below), whose sum is σ = 1574926170. Its totient is φ = 406432544.

The previous prime is 812865101. The next prime is 812865113. The reversal of 812865104 is 401568218.

It can be written as a sum of positive squares in only one way, i.e., 711822400 + 101042704 = 26680^2 + 10052^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812865101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25402019 + ... + 25402050.

It is an arithmetic number, because the mean of its divisors is an integer number (157492617).

Almost surely, 2^812865104 is an apocalyptic number.

It is an amenable number.

812865104 is a deficient number, since it is larger than the sum of its proper divisors (762061066).

812865104 is a wasteful number, since it uses less digits than its factorization.

812865104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50804077 (or 50804071 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 812865104 is about 28510.7892559992. The cubic root of 812865104 is about 933.2675379923.

The spelling of 812865104 in words is "eight hundred twelve million, eight hundred sixty-five thousand, one hundred four".