12615131 has 4 divisors (see below), whose sum is σ = 12737712. Its totient is φ = 12492552.

The previous prime is 12615121. The next prime is 12615143. The reversal of 12615131 is 13151621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13151621 = 7 ⋅1878803.

It is a cyclic number.

It is not a de Polignac number, because 12615131 - 2²² = 8420827 is a prime.

It is a super-2 number, since 2×12615131² = 318283060294322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12615101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61136 + ... + 61341.

It is an arithmetic number, because the mean of its divisors is an integer number (3184428).

Almost surely, 2^12615131 is an apocalyptic number.

12615131 is a deficient number, since it is larger than the sum of its proper divisors (122581).

12615131 is a wasteful number, since it uses less digits than its factorization.

12615131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122580.

The product of its digits is 180, while the sum is 20.

The square root of 12615131 is about 3551.7785685484. The cubic root of 12615131 is about 232.7897862711.

Adding to 12615131 its reverse (13151621), we get a palindrome (25766752).

The spelling of 12615131 in words is "twelve million, six hundred fifteen thousand, one hundred thirty-one".