13122971 has 2 divisors, whose sum is σ = 13122972. Its totient is φ = 13122970.

The previous prime is 13122953. The next prime is 13122979. The reversal of 13122971 is 17922131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13122971 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13122971.

It is not a weakly prime, because it can be changed into another prime (13122979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6561485 + 6561486.

It is an arithmetic number, because the mean of its divisors is an integer number (6561486).

Almost surely, 2^13122971 is an apocalyptic number.

13122971 is a deficient number, since it is larger than the sum of its proper divisors (1).

13122971 is an equidigital number, since it uses as much as digits as its factorization.

13122971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 26.

The square root of 13122971 is about 3622.5641471201. The cubic root of 13122971 is about 235.8725432134.

The spelling of 13122971 in words is "thirteen million, one hundred twenty-two thousand, nine hundred seventy-one".