12556451 has 4 divisors (see below), whose sum is σ = 12579552. Its totient is φ = 12533352.

The previous prime is 12556441. The next prime is 12556463. The reversal of 12556451 is 15465521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15465521 = 2969 ⋅5209.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12556451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12556441) 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, 10715 + ... + 11828.

It is an arithmetic number, because the mean of its divisors is an integer number (3144888).

Almost surely, 2^12556451 is an apocalyptic number.

12556451 is a deficient number, since it is larger than the sum of its proper divisors (23101).

12556451 is an equidigital number, since it uses as much as digits as its factorization.

12556451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23100.

The product of its digits is 6000, while the sum is 29.

The square root of 12556451 is about 3543.5082898167. The cubic root of 12556451 is about 232.4282801873.

The spelling of 12556451 in words is "twelve million, five hundred fifty-six thousand, four hundred fifty-one".