12561942 has 16 divisors (see below), whose sum is σ = 25207920. Its totient is φ = 4173312.

The previous prime is 12561931. The next prime is 12561947. The reversal of 12561942 is 24916521.

It is a super-2 number, since 2×12561942² = 315604773622728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12561947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1467 + ... + 5222.

It is an arithmetic number, because the mean of its divisors is an integer number (1575495).

Almost surely, 2^12561942 is an apocalyptic number.

12561942 is an abundant number, since it is smaller than the sum of its proper divisors (12645978).

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

12561942 is a wasteful number, since it uses less digits than its factorization.

12561942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7007.

The product of its digits is 4320, while the sum is 30.

The square root of 12561942 is about 3544.2830022446. The cubic root of 12561942 is about 232.4621559401.

The spelling of 12561942 in words is "twelve million, five hundred sixty-one thousand, nine hundred forty-two".