12539863 has 16 divisors (see below), whose sum is σ = 15289344. Its totient is φ = 10039680.

The previous prime is 12539851. The next prime is 12539873. The reversal of 12539863 is 36893521.

It is not a de Polignac number, because 12539863 - 2¹³ = 12531671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12539843) 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, 19558 + ... + 20188.

It is an arithmetic number, because the mean of its divisors is an integer number (955584).

Almost surely, 2^12539863 is an apocalyptic number.

12539863 is a deficient number, since it is larger than the sum of its proper divisors (2749481).

12539863 is a wasteful number, since it uses less digits than its factorization.

12539863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822.

The product of its digits is 38880, while the sum is 37.

The square root of 12539863 is about 3541.1668980719. The cubic root of 12539863 is about 232.3258834360.

The spelling of 12539863 in words is "twelve million, five hundred thirty-nine thousand, eight hundred sixty-three".