1257957 has 8 divisors (see below), whose sum is σ = 1863680. Its totient is φ = 838620.

The previous prime is 1257953. The next prime is 1257959. The reversal of 1257957 is 7597521.

It is not a de Polignac number, because 1257957 - 2² = 1257953 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23269 + ... + 23322.

It is an arithmetic number, because the mean of its divisors is an integer number (232960).

2^1257957 is an apocalyptic number.

It is an amenable number.

1257957 is a deficient number, since it is larger than the sum of its proper divisors (605723).

1257957 is an equidigital number, since it uses as much as digits as its factorization.

1257957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46600 (or 46594 counting only the distinct ones).

The product of its digits is 22050, while the sum is 36.

The square root of 1257957 is about 1121.5868223192. The cubic root of 1257957 is about 107.9498223697.

It can be divided in two parts, 12579 and 57, that multiplied together give a triangular number (717003 = T₁₁₉₇).

The spelling of 1257957 in words is "one million, two hundred fifty-seven thousand, nine hundred fifty-seven".