12516539 has 16 divisors (see below), whose sum is σ = 15303168. Its totient is φ = 9992832.

The previous prime is 12516481. The next prime is 12516563. The reversal of 12516539 is 93561521.

It is a cyclic number.

It is not a de Polignac number, because 12516539 - 2¹² = 12512443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12516599) 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, 12242 + ... + 13224.

It is an arithmetic number, because the mean of its divisors is an integer number (956448).

Almost surely, 2^12516539 is an apocalyptic number.

12516539 is a deficient number, since it is larger than the sum of its proper divisors (2786629).

12516539 is a wasteful number, since it uses less digits than its factorization.

12516539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1114.

The product of its digits is 8100, while the sum is 32.

The square root of 12516539 is about 3537.8721005712. The cubic root of 12516539 is about 232.1817528875.

The spelling of 12516539 in words is "twelve million, five hundred sixteen thousand, five hundred thirty-nine".