12157856 has 24 divisors (see below), whose sum is σ = 25344900. Its totient is φ = 5721088.

The previous prime is 12157841. The next prime is 12157861. The reversal of 12157856 is 65875121.

It can be written as a sum of positive squares in 2 ways, for example, as 12138256 + 19600 = 3484^2 + 140^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10631 + ... + 11718.

Almost surely, 2^12157856 is an apocalyptic number.

12157856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12157856 is an abundant number, since it is smaller than the sum of its proper divisors (13187044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12157856 is a wasteful number, since it uses less digits than its factorization.

12157856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22376 (or 22368 counting only the distinct ones).

The product of its digits is 16800, while the sum is 35.

The square root of 12157856 is about 3486.8117241973. The cubic root of 12157856 is about 229.9423674124.

The spelling of 12157856 in words is "twelve million, one hundred fifty-seven thousand, eight hundred fifty-six".