12856857 has 8 divisors (see below), whose sum is σ = 18461184. Its totient is φ = 7911888.

The previous prime is 12856849. The next prime is 12856859. The reversal of 12856857 is 75865821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12856857 - 2³ = 12856849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12856859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164793 + ... + 164870.

It is an arithmetic number, because the mean of its divisors is an integer number (2307648).

Almost surely, 2^12856857 is an apocalyptic number.

It is an amenable number.

12856857 is a deficient number, since it is larger than the sum of its proper divisors (5604327).

12856857 is a wasteful number, since it uses less digits than its factorization.

12856857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329679.

The product of its digits is 134400, while the sum is 42.

The square root of 12856857 is about 3585.6459669075. The cubic root of 12856857 is about 234.2672634793.

The spelling of 12856857 in words is "twelve million, eight hundred fifty-six thousand, eight hundred fifty-seven".