12557256 has 16 divisors (see below), whose sum is σ = 31393200. Its totient is φ = 4185744.

The previous prime is 12557239. The next prime is 12557257. The reversal of 12557256 is 65275521.

It is not an unprimeable number, because it can be changed into a prime (12557257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 261586 + ... + 261633.

It is an arithmetic number, because the mean of its divisors is an integer number (1962075).

Almost surely, 2^12557256 is an apocalyptic number.

It is an amenable number.

12557256 is an abundant number, since it is smaller than the sum of its proper divisors (18835944).

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

12557256 is a wasteful number, since it uses less digits than its factorization.

12557256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523228 (or 523224 counting only the distinct ones).

The product of its digits is 21000, while the sum is 33.

The square root of 12557256 is about 3543.6218759907. The cubic root of 12557256 is about 232.4332471100.

The spelling of 12557256 in words is "twelve million, five hundred fifty-seven thousand, two hundred fifty-six".