12564243 has 6 divisors (see below), whose sum is σ = 18148364. Its totient is φ = 8376156.

The previous prime is 12564193. The next prime is 12564247. The reversal of 12564243 is 34246521.

12564243 is a `hidden beast` number, since 12 + 5 + 642 + 4 + 3 = 666.

It is not a de Polignac number, because 12564243 - 2¹² = 12560147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12564247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 698005 + ... + 698022.

Almost surely, 2^12564243 is an apocalyptic number.

12564243 is a deficient number, since it is larger than the sum of its proper divisors (5584121).

12564243 is a wasteful number, since it uses less digits than its factorization.

12564243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396033 (or 1396030 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 12564243 is about 3544.6075946429. The cubic root of 12564243 is about 232.4763486174.

The spelling of 12564243 in words is "twelve million, five hundred sixty-four thousand, two hundred forty-three".