12643256 has 16 divisors (see below), whose sum is σ = 24154200. Its totient is φ = 6202144.

The previous prime is 12643249. The next prime is 12643273. The reversal of 12643256 is 65234621.

12643256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 14486 + ... + 15333.

Almost surely, 2^12643256 is an apocalyptic number.

It is an amenable number.

12643256 is a deficient number, since it is larger than the sum of its proper divisors (11510944).

12643256 is a wasteful number, since it uses less digits than its factorization.

12643256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29878 (or 29874 counting only the distinct ones).

The product of its digits is 8640, while the sum is 29.

The square root of 12643256 is about 3555.7356482168. The cubic root of 12643256 is about 232.9626568015.

Adding to 12643256 its reverse (65234621), we get a palindrome (77877877).

The spelling of 12643256 in words is "twelve million, six hundred forty-three thousand, two hundred fifty-six".