12315564 has 30 divisors (see below), whose sum is σ = 32196164. Its totient is φ = 4105080.

The previous prime is 12315559. The next prime is 12315577. The reversal of 12315564 is 46551321.

12315564 is an esthetic number in base 8, because in such base its adjacent digits differ by 1.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 18682 + ... + 19329.

Almost surely, 2^12315564 is an apocalyptic number.

It is an amenable number.

12315564 is an abundant number, since it is smaller than the sum of its proper divisors (19880600).

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

12315564 is a wasteful number, since it uses less digits than its factorization.

12315564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38027 (or 38016 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 12315564 is about 3509.3537866679. The cubic root of 12315564 is about 230.9323465231.

Adding to 12315564 its reverse (46551321), we get a palindrome (58866885).

The spelling of 12315564 in words is "twelve million, three hundred fifteen thousand, five hundred sixty-four".