812660457 has 24 divisors (see below), whose sum is σ = 1306958016. Its totient is φ = 439932384.

The previous prime is 812660411. The next prime is 812660477. The reversal of 812660457 is 754066218.

It is not a de Polignac number, because 812660457 - 2⁶ = 812660393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (812660477) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46018 + ... + 61179.

It is an arithmetic number, because the mean of its divisors is an integer number (54456584).

Almost surely, 2^812660457 is an apocalyptic number.

It is an amenable number.

812660457 is a deficient number, since it is larger than the sum of its proper divisors (494297559).

812660457 is a wasteful number, since it uses less digits than its factorization.

812660457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107245 (or 107226 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 812660457 is about 28507.2000905035. The cubic root of 812660457 is about 933.1892115758.

The spelling of 812660457 in words is "eight hundred twelve million, six hundred sixty thousand, four hundred fifty-seven".