12561508 has 24 divisors (see below), whose sum is σ = 23284800. Its totient is φ = 5912928.

The previous prime is 12561491. The next prime is 12561509. The reversal of 12561508 is 80516521.

It is not an unprimeable number, because it can be changed into a prime (12561509) 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, 14553 + ... + 15391.

It is an arithmetic number, because the mean of its divisors is an integer number (970200).

Almost surely, 2^12561508 is an apocalyptic number.

It is an amenable number.

12561508 is a deficient number, since it is larger than the sum of its proper divisors (10723292).

12561508 is a wasteful number, since it uses less digits than its factorization.

12561508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059 (or 1057 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 12561508 is about 3544.2217763566. The cubic root of 12561508 is about 232.4594788132.

The spelling of 12561508 in words is "twelve million, five hundred sixty-one thousand, five hundred eight".