12561572 has 48 divisors (see below), whose sum is σ = 24675840. Its totient is φ = 5568000.

The previous prime is 12561551. The next prime is 12561599. The reversal of 12561572 is 27516521.

It is a super-2 number, since 2×12561572² = 315586182222368, which contains 22 as substring.

Its product of digits (4200) is a multiple of the sum of its prime divisors (210).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124322 + ... + 124422.

It is an arithmetic number, because the mean of its divisors is an integer number (514080).

Almost surely, 2^12561572 is an apocalyptic number.

It is an amenable number.

12561572 is a deficient number, since it is larger than the sum of its proper divisors (12114268).

12561572 is a wasteful number, since it uses less digits than its factorization.

12561572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 210 counting only the distinct ones).

The product of its digits is 4200, while the sum is 29.

The square root of 12561572 is about 3544.2308051254. The cubic root of 12561572 is about 232.4598736008.

The spelling of 12561572 in words is "twelve million, five hundred sixty-one thousand, five hundred seventy-two".