12957291 has 6 divisors (see below), whose sum is σ = 18716100. Its totient is φ = 8638188.

The previous prime is 12957253. The next prime is 12957293. The reversal of 12957291 is 19275921.

It is not a de Polignac number, because 12957291 - 2¹⁸ = 12695147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12957293) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 719841 + ... + 719858.

It is an arithmetic number, because the mean of its divisors is an integer number (3119350).

Almost surely, 2^12957291 is an apocalyptic number.

12957291 is a deficient number, since it is larger than the sum of its proper divisors (5758809).

12957291 is a wasteful number, since it uses less digits than its factorization.

12957291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439705 (or 1439702 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 12957291 is about 3599.6237303363. The cubic root of 12957291 is about 234.8756910080.

The spelling of 12957291 in words is "twelve million, nine hundred fifty-seven thousand, two hundred ninety-one".