12539216 has 10 divisors (see below), whose sum is σ = 24294762. Its totient is φ = 6269600.

The previous prime is 12539179. The next prime is 12539231. The reversal of 12539216 is 61293521.

It can be written as a sum of positive squares in only one way, i.e., 6760000 + 5779216 = 2600^2 + 2404^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391835 + ... + 391866.

Almost surely, 2^12539216 is an apocalyptic number.

12539216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12539216 is a deficient number, since it is larger than the sum of its proper divisors (11755546).

12539216 is an equidigital number, since it uses as much as digits as its factorization.

12539216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783709 (or 783703 counting only the distinct ones).

The product of its digits is 3240, while the sum is 29.

The square root of 12539216 is about 3541.0755428259. The cubic root of 12539216 is about 232.3218877137.

The spelling of 12539216 in words is "twelve million, five hundred thirty-nine thousand, two hundred sixteen".