2557957 has 2 divisors, whose sum is σ = 2557958. Its totient is φ = 2557956.

The previous prime is 2557937. The next prime is 2557963. The reversal of 2557957 is 7597552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2556801 + 1156 = 1599^2 + 34^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557957 - 2¹⁵ = 2525189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278978 + 1278979.

It is an arithmetic number, because the mean of its divisors is an integer number (1278979).

2^2557957 is an apocalyptic number.

It is an amenable number.

2557957 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557957 is an equidigital number, since it uses as much as digits as its factorization.

2557957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110250, while the sum is 40.

The square root of 2557957 is about 1599.3614350734. The cubic root of 2557957 is about 136.7616756238.

The spelling of 2557957 in words is "two million, five hundred fifty-seven thousand, nine hundred fifty-seven".