1257232057 has 2 divisors, whose sum is σ = 1257232058. Its totient is φ = 1257232056.

The previous prime is 1257232013. The next prime is 1257232069. The reversal of 1257232057 is 7502327521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1106826361 + 150405696 = 33269^2 + 12264^2 .

It is a cyclic number.

It is not a de Polignac number, because 1257232057 - 2²⁷ = 1123014329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1257232007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628616028 + 628616029.

It is an arithmetic number, because the mean of its divisors is an integer number (628616029).

Almost surely, 2^1257232057 is an apocalyptic number.

It is an amenable number.

1257232057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257232057 is an equidigital number, since it uses as much as digits as its factorization.

1257232057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 1257232057 is about 35457.4682824366. The cubic root of 1257232057 is about 1079.2908172813.

Adding to 1257232057 its reverse (7502327521), we get a palindrome (8759559578).

The spelling of 1257232057 in words is "one billion, two hundred fifty-seven million, two hundred thirty-two thousand, fifty-seven".