12515881 has 12 divisors (see below), whose sum is σ = 14659392. Its totient is φ = 10467576.

The previous prime is 12515873. The next prime is 12515903. The reversal of 12515881 is 18851521.

It is not a de Polignac number, because 12515881 - 2³ = 12515873 is a prime.

It is a super-2 number, since 2×12515881² = 313294554412322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12515081) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12460 + ... + 13426.

It is an arithmetic number, because the mean of its divisors is an integer number (1221616).

Almost surely, 2^12515881 is an apocalyptic number.

It is an amenable number.

12515881 is a deficient number, since it is larger than the sum of its proper divisors (2143511).

12515881 is an frugal number, since it uses more digits than its factorization.

12515881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060 (or 1017 counting only the distinct ones).

The product of its digits is 3200, while the sum is 31.

The square root of 12515881 is about 3537.7791055972. The cubic root of 12515881 is about 232.1776841837.

The spelling of 12515881 in words is "twelve million, five hundred fifteen thousand, eight hundred eighty-one".