12911161 has 2 divisors, whose sum is σ = 12911162. Its totient is φ = 12911160.

The previous prime is 12911123. The next prime is 12911191. The reversal of 12911161 is 16111921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10791225 + 2119936 = 3285^2 + 1456^2 .

It is a cyclic number.

It is not a de Polignac number, because 12911161 - 2⁷ = 12911033 is a prime.

It is not a weakly prime, because it can be changed into another prime (12911191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6455580 + 6455581.

It is an arithmetic number, because the mean of its divisors is an integer number (6455581).

Almost surely, 2^12911161 is an apocalyptic number.

It is an amenable number.

12911161 is a deficient number, since it is larger than the sum of its proper divisors (1).

12911161 is an equidigital number, since it uses as much as digits as its factorization.

12911161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 22.

The square root of 12911161 is about 3593.2104029684. The cubic root of 12911161 is about 234.5966280721.

The spelling of 12911161 in words is "twelve million, nine hundred eleven thousand, one hundred sixty-one".