12256857 has 12 divisors (see below), whose sum is σ = 17734704. Its totient is φ = 8157240.

The previous prime is 12256831. The next prime is 12256883. The reversal of 12256857 is 75865221.

It is a happy number.

12256857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12256831) and next prime (12256883).

It is a de Polignac number, because none of the positive numbers 2^k-12256857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12256807) 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, 9882 + ... + 11052.

It is an arithmetic number, because the mean of its divisors is an integer number (1477892).

Almost surely, 2^12256857 is an apocalyptic number.

It is an amenable number.

12256857 is a deficient number, since it is larger than the sum of its proper divisors (5477847).

12256857 is a wasteful number, since it uses less digits than its factorization.

12256857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340 (or 2337 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 12256857 is about 3500.9794343869. The cubic root of 12256857 is about 230.5648185007.

The spelling of 12256857 in words is "twelve million, two hundred fifty-six thousand, eight hundred fifty-seven".