12931345 has 24 divisors (see below), whose sum is σ = 18451584. Its totient is φ = 8670816.

The previous prime is 12931327. The next prime is 12931349. The reversal of 12931345 is 54313921.

It is not a de Polignac number, because 12931345 - 2⁹ = 12930833 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12931349) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10954 + ... + 12076.

It is an arithmetic number, because the mean of its divisors is an integer number (768816).

Almost surely, 2^12931345 is an apocalyptic number.

It is an amenable number.

12931345 is a deficient number, since it is larger than the sum of its proper divisors (5520239).

12931345 is a wasteful number, since it uses less digits than its factorization.

12931345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1182 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 12931345 is about 3596.0179365515. The cubic root of 12931345 is about 234.7188126178.

The spelling of 12931345 in words is "twelve million, nine hundred thirty-one thousand, three hundred forty-five".