1265372957 has 2 divisors, whose sum is σ = 1265372958. Its totient is φ = 1265372956.

The previous prime is 1265372909. The next prime is 1265373023. The reversal of 1265372957 is 7592735621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1048075876 + 217297081 = 32374^2 + 14741^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265372957 - 2⁶ = 1265372893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265372557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632686478 + 632686479.

It is an arithmetic number, because the mean of its divisors is an integer number (632686479).

Almost surely, 2^1265372957 is an apocalyptic number.

It is an amenable number.

1265372957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265372957 is an equidigital number, since it uses as much as digits as its factorization.

1265372957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 47.

The square root of 1265372957 is about 35572.0811451903. The cubic root of 1265372957 is about 1081.6153687347.

The spelling of 1265372957 in words is "one billion, two hundred sixty-five million, three hundred seventy-two thousand, nine hundred fifty-seven".