13247312 has 20 divisors (see below), whose sum is σ = 27641460. Its totient is φ = 6114048.

The previous prime is 13247303. The next prime is 13247317. The reversal of 13247312 is 21374231.

It can be written as a sum of positive squares in 2 ways, for example, as 4343056 + 8904256 = 2084^2 + 2984^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13247317) 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, 31637 + ... + 32052.

It is an arithmetic number, because the mean of its divisors is an integer number (1382073).

Almost surely, 2^13247312 is an apocalyptic number.

It is an amenable number.

13247312 is an abundant number, since it is smaller than the sum of its proper divisors (14394148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13247312 is a wasteful number, since it uses less digits than its factorization.

13247312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63710 (or 63704 counting only the distinct ones).

The product of its digits is 1008, while the sum is 23.

The square root of 13247312 is about 3639.6857007165. The cubic root of 13247312 is about 236.6151718509.

It can be divided in two parts, 1324731 and 2, that multiplied together give a palindrome (2649462).

The spelling of 13247312 in words is "thirteen million, two hundred forty-seven thousand, three hundred twelve".