2557897 has 2 divisors, whose sum is σ = 2557898. Its totient is φ = 2557896.

The previous prime is 2557889. The next prime is 2557901. The reversal of 2557897 is 7987552.

2557897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2509056 + 48841 = 1584^2 + 221^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557897 - 2³ = 2557889 is a prime.

It is not a weakly prime, because it can be changed into another prime (2557817) 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 as a sum of consecutive naturals, namely, 1278948 + 1278949.

It is an arithmetic number, because the mean of its divisors is an integer number (1278949).

2^2557897 is an apocalyptic number.

It is an amenable number.

2557897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557897 is an equidigital number, since it uses as much as digits as its factorization.

2557897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 43.

The square root of 2557897 is about 1599.3426774772. The cubic root of 2557897 is about 136.7606063115.

The spelling of 2557897 in words is "two million, five hundred fifty-seven thousand, eight hundred ninety-seven".