11572564 has 12 divisors (see below), whose sum is σ = 20799604. Its totient is φ = 5629824.

The previous prime is 11572543. The next prime is 11572567. The reversal of 11572564 is 46527511.

It can be written as a sum of positive squares in 2 ways, for example, as 4443664 + 7128900 = 2108^2 + 2670^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11572567) 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, 38949 + ... + 39244.

Almost surely, 2^11572564 is an apocalyptic number.

It is an amenable number.

11572564 is a deficient number, since it is larger than the sum of its proper divisors (9227040).

11572564 is a wasteful number, since it uses less digits than its factorization.

11572564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78234 (or 78232 counting only the distinct ones).

The product of its digits is 8400, while the sum is 31.

The square root of 11572564 is about 3401.8471453021. The cubic root of 11572564 is about 226.1916300897.

It can be divided in two parts, 1157 and 2564, that added together give a square (3721 = 61²).

The spelling of 11572564 in words is "eleven million, five hundred seventy-two thousand, five hundred sixty-four".