12517857 has 12 divisors (see below), whose sum is σ = 19725264. Its totient is φ = 7586520.

The previous prime is 12517849. The next prime is 12517873. The reversal of 12517857 is 75871521.

12517857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12517857 - 2³ = 12517849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12517847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63123 + ... + 63320.

It is an arithmetic number, because the mean of its divisors is an integer number (1643772).

Almost surely, 2^12517857 is an apocalyptic number.

It is an amenable number.

12517857 is a deficient number, since it is larger than the sum of its proper divisors (7207407).

12517857 is a wasteful number, since it uses less digits than its factorization.

12517857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126460 (or 126457 counting only the distinct ones).

The product of its digits is 19600, while the sum is 36.

The square root of 12517857 is about 3538.0583658272. The cubic root of 12517857 is about 232.1899022332.

The spelling of 12517857 in words is "twelve million, five hundred seventeen thousand, eight hundred fifty-seven".