1297161215957 has 2 divisors, whose sum is σ = 1297161215958. Its totient is φ = 1297161215956.

The previous prime is 1297161215873. The next prime is 1297161216011. The reversal of 1297161215957 is 7595121617921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 899900774161 + 397260441796 = 948631^2 + 630286^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297161215957 - 2¹⁸ = 1297160953813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297161215257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648580607978 + 648580607979.

It is an arithmetic number, because the mean of its divisors is an integer number (648580607979).

Almost surely, 2^{1297161215957} is an apocalyptic number.

It is an amenable number.

1297161215957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297161215957 is an equidigital number, since it uses as much as digits as its factorization.

1297161215957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2381400, while the sum is 56.

The spelling of 1297161215957 in words is "one trillion, two hundred ninety-seven billion, one hundred sixty-one million, two hundred fifteen thousand, nine hundred fifty-seven".