12539513 has 16 divisors (see below), whose sum is σ = 14945280. Its totient is φ = 10293696.

The previous prime is 12539509. The next prime is 12539537. The reversal of 12539513 is 31593521.

It is not a de Polignac number, because 12539513 - 2² = 12539509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12539503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45131 + ... + 45407.

It is an arithmetic number, because the mean of its divisors is an integer number (934080).

Almost surely, 2^12539513 is an apocalyptic number.

It is an amenable number.

12539513 is a deficient number, since it is larger than the sum of its proper divisors (2405767).

12539513 is a wasteful number, since it uses less digits than its factorization.

12539513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536.

The product of its digits is 4050, while the sum is 29.

The square root of 12539513 is about 3541.1174789888. The cubic root of 12539513 is about 232.3237219341.

The spelling of 12539513 in words is "twelve million, five hundred thirty-nine thousand, five hundred thirteen".