12557564 has 6 divisors (see below), whose sum is σ = 21975744. Its totient is φ = 6278780.

The previous prime is 12557561. The next prime is 12557569. The reversal of 12557564 is 46575521.

It is a super-2 number, since 2×12557564² = 315384827228192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12557561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1569692 + ... + 1569699.

It is an arithmetic number, because the mean of its divisors is an integer number (3662624).

Almost surely, 2^12557564 is an apocalyptic number.

It is an amenable number.

12557564 is a deficient number, since it is larger than the sum of its proper divisors (9418180).

12557564 is a wasteful number, since it uses less digits than its factorization.

12557564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3139395 (or 3139393 counting only the distinct ones).

The product of its digits is 42000, while the sum is 35.

The square root of 12557564 is about 3543.6653340856. The cubic root of 12557564 is about 232.4351474417.

The spelling of 12557564 in words is "twelve million, five hundred fifty-seven thousand, five hundred sixty-four".