12971611 has 2 divisors, whose sum is σ = 12971612. Its totient is φ = 12971610.

The previous prime is 12971603. The next prime is 12971617. The reversal of 12971611 is 11617921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12971611 - 2³ = 12971603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12971611.

It is not a weakly prime, because it can be changed into another prime (12971617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6485805 + 6485806.

It is an arithmetic number, because the mean of its divisors is an integer number (6485806).

Almost surely, 2^12971611 is an apocalyptic number.

12971611 is a deficient number, since it is larger than the sum of its proper divisors (1).

12971611 is an equidigital number, since it uses as much as digits as its factorization.

12971611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 28.

The square root of 12971611 is about 3601.6122778556. The cubic root of 12971611 is about 234.9621849520.

The spelling of 12971611 in words is "twelve million, nine hundred seventy-one thousand, six hundred eleven".