12520539 has 12 divisors (see below), whose sum is σ = 18526872. Its totient is φ = 8143200.

The previous prime is 12520537. The next prime is 12520553. The reversal of 12520539 is 93502521.

12520539 is a `hidden beast` number, since 125 + 2 + 0 + 539 = 666.

It is not a de Polignac number, because 12520539 - 2¹ = 12520537 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (12520531) 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, 16597 + ... + 17334.

It is an arithmetic number, because the mean of its divisors is an integer number (1543906).

Almost surely, 2^12520539 is an apocalyptic number.

12520539 is a deficient number, since it is larger than the sum of its proper divisors (6006333).

12520539 is a wasteful number, since it uses less digits than its factorization.

12520539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33978 (or 33975 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 12520539 is about 3538.4373669743. The cubic root of 12520539 is about 232.2064835817.

The spelling of 12520539 in words is "twelve million, five hundred twenty thousand, five hundred thirty-nine".