12561542 has 24 divisors (see below), whose sum is σ = 22875696. Its totient is φ = 5148528.

The previous prime is 12561529. The next prime is 12561551. The reversal of 12561542 is 24516521.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 533 + ... + 5040.

It is an arithmetic number, because the mean of its divisors is an integer number (953154).

Almost surely, 2^12561542 is an apocalyptic number.

12561542 is a deficient number, since it is larger than the sum of its proper divisors (10314154).

12561542 is a wasteful number, since it uses less digits than its factorization.

12561542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5612 (or 5605 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 12561542 is about 3544.2265728929. The cubic root of 12561542 is about 232.4596885443.

The spelling of 12561542 in words is "twelve million, five hundred sixty-one thousand, five hundred forty-two".