12561424 has 20 divisors (see below), whose sum is σ = 24798636. Its totient is φ = 6161792.

The previous prime is 12561401. The next prime is 12561431. The reversal of 12561424 is 42416521.

It is a happy number.

12561424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6411024 + 6150400 = 2532^2 + 2480^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6559 + ... + 8254.

Almost surely, 2^12561424 is an apocalyptic number.

It is an amenable number.

12561424 is a deficient number, since it is larger than the sum of its proper divisors (12237212).

12561424 is a wasteful number, since it uses less digits than its factorization.

12561424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14874 (or 14868 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 12561424 is about 3544.2099260625. The cubic root of 12561424 is about 232.4589606525.

Adding to 12561424 its reverse (42416521), we get a palindrome (54977945).

The spelling of 12561424 in words is "twelve million, five hundred sixty-one thousand, four hundred twenty-four".