12931045 has 4 divisors (see below), whose sum is σ = 15517260. Its totient is φ = 10344832.

The previous prime is 12931043. The next prime is 12931049. The reversal of 12931045 is 54013921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8398404 + 4532641 = 2898^2 + 2129^2 .

It is a cyclic number.

It is not a de Polignac number, because 12931045 - 2¹ = 12931043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12931043) 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, 1293100 + ... + 1293109.

It is an arithmetic number, because the mean of its divisors is an integer number (3879315).

Almost surely, 2^12931045 is an apocalyptic number.

It is an amenable number.

12931045 is a deficient number, since it is larger than the sum of its proper divisors (2586215).

12931045 is an equidigital number, since it uses as much as digits as its factorization.

12931045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2586214.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12931045 is about 3595.9762235032. The cubic root of 12931045 is about 234.7169974886.

Adding to 12931045 its reverse (54013921), we get a palindrome (66944966).

The spelling of 12931045 in words is "twelve million, nine hundred thirty-one thousand, forty-five".