13121291 has 2 divisors, whose sum is σ = 13121292. Its totient is φ = 13121290.

The previous prime is 13121279. The next prime is 13121309. The reversal of 13121291 is 19212131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13121291 - 2²² = 8926987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13121231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6560645 + 6560646.

It is an arithmetic number, because the mean of its divisors is an integer number (6560646).

Almost surely, 2^13121291 is an apocalyptic number.

13121291 is a deficient number, since it is larger than the sum of its proper divisors (1).

13121291 is an equidigital number, since it uses as much as digits as its factorization.

13121291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 20.

The square root of 13121291 is about 3622.3322597465. The cubic root of 13121291 is about 235.8624773327.

The spelling of 13121291 in words is "thirteen million, one hundred twenty-one thousand, two hundred ninety-one".