2557297 has 2 divisors, whose sum is σ = 2557298. Its totient is φ = 2557296.

The previous prime is 2557279. The next prime is 2557333. The reversal of 2557297 is 7927552.

Together with previous prime (2557279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2421136 + 136161 = 1556^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557297 - 2⁷ = 2557169 is a prime.

2557297 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2557277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278648 + 1278649.

It is an arithmetic number, because the mean of its divisors is an integer number (1278649).

2^2557297 is an apocalyptic number.

It is an amenable number.

2557297 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557297 is an equidigital number, since it uses as much as digits as its factorization.

2557297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 37.

The square root of 2557297 is about 1599.1550894144. The cubic root of 2557297 is about 136.7499122686.

The spelling of 2557297 in words is "two million, five hundred fifty-seven thousand, two hundred ninety-seven".