812810125 has 16 divisors (see below), whose sum is σ = 1024446384. Its totient is φ = 643800000.

The previous prime is 812810113. The next prime is 812810129. The reversal of 812810125 is 521018218.

812810125 = 228³ + 229³ + ... + 277³.

It can be written as a sum of positive squares in 8 ways, for example, as 26904969 + 785905156 = 5187^2 + 28034^2 .

It is not a de Polignac number, because 812810125 - 2⁷ = 812809997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 812810093 and 812810102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812810129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19566 + ... + 44815.

It is an arithmetic number, because the mean of its divisors is an integer number (64027899).

Almost surely, 2^812810125 is an apocalyptic number.

It is an amenable number.

812810125 is a deficient number, since it is larger than the sum of its proper divisors (211636259).

812810125 is a wasteful number, since it uses less digits than its factorization.

812810125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64497 (or 64487 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 812810125 is about 28509.8250608453. The cubic root of 812810125 is about 933.2464966688.

The spelling of 812810125 in words is "eight hundred twelve million, eight hundred ten thousand, one hundred twenty-five".