12981313 has 8 divisors (see below), whose sum is σ = 13983200. Its totient is φ = 12011328.

The previous prime is 12981307. The next prime is 12981329. The reversal of 12981313 is 31318921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12981313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12981113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7128 + ... + 8761.

It is an arithmetic number, because the mean of its divisors is an integer number (1747900).

Almost surely, 2^12981313 is an apocalyptic number.

It is an amenable number.

12981313 is a deficient number, since it is larger than the sum of its proper divisors (1001887).

12981313 is a wasteful number, since it uses less digits than its factorization.

12981313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15951.

The product of its digits is 1296, while the sum is 28.

The square root of 12981313 is about 3602.9589228855. The cubic root of 12981313 is about 235.0207496391.

The spelling of 12981313 in words is "twelve million, nine hundred eighty-one thousand, three hundred thirteen".