12816239 has 4 divisors (see below), whose sum is σ = 12826800. Its totient is φ = 12805680.

The previous prime is 12816211. The next prime is 12816247. The reversal of 12816239 is 93261821.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12816239 - 2¹² = 12812143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12816259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3182 + ... + 5979.

It is an arithmetic number, because the mean of its divisors is an integer number (3206700).

Almost surely, 2^12816239 is an apocalyptic number.

12816239 is a deficient number, since it is larger than the sum of its proper divisors (10561).

12816239 is an equidigital number, since it uses as much as digits as its factorization.

12816239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10560.

The product of its digits is 5184, while the sum is 32.

The square root of 12816239 is about 3579.9775138959. The cubic root of 12816239 is about 234.0203004279.

The spelling of 12816239 in words is "twelve million, eight hundred sixteen thousand, two hundred thirty-nine".