12731316 has 24 divisors (see below), whose sum is σ = 31991904. Its totient is φ = 3917280.

The previous prime is 12731281. The next prime is 12731339. The reversal of 12731316 is 61313721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40650 + ... + 40961.

It is an arithmetic number, because the mean of its divisors is an integer number (1332996).

Almost surely, 2^12731316 is an apocalyptic number.

It is an amenable number.

12731316 is an abundant number, since it is smaller than the sum of its proper divisors (19260588).

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

12731316 is a wasteful number, since it uses less digits than its factorization.

12731316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81631 (or 81629 counting only the distinct ones).

The product of its digits is 756, while the sum is 24.

The square root of 12731316 is about 3568.0969717764. The cubic root of 12731316 is about 233.5022658725.

The spelling of 12731316 in words is "twelve million, seven hundred thirty-one thousand, three hundred sixteen".