12556287 has 12 divisors (see below), whose sum is σ = 18269160. Its totient is φ = 8309808.

The previous prime is 12556277. The next prime is 12556307. The reversal of 12556287 is 78265521.

It is a happy number.

12556287 is a `hidden beast` number, since 1 + 25 + 5 + 628 + 7 = 666.

It is not a de Polignac number, because 12556287 - 2⁶ = 12556223 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12556237) 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, 3768 + ... + 6269.

It is an arithmetic number, because the mean of its divisors is an integer number (1522430).

Almost surely, 2^12556287 is an apocalyptic number.

12556287 is a deficient number, since it is larger than the sum of its proper divisors (5712873).

12556287 is a wasteful number, since it uses less digits than its factorization.

12556287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10182 (or 10179 counting only the distinct ones).

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

The square root of 12556287 is about 3543.4851488330. The cubic root of 12556287 is about 232.4272682664.

The spelling of 12556287 in words is "twelve million, five hundred fifty-six thousand, two hundred eighty-seven".