2557601 has 2 divisors, whose sum is σ = 2557602. Its totient is φ = 2557600.

The previous prime is 2557567. The next prime is 2557603. The reversal of 2557601 is 1067552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1893376 + 664225 = 1376^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557601 - 2¹⁰ = 2556577 is a prime.

It is a Sophie Germain prime.

Together with 2557603, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2557603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278800 + 1278801.

It is an arithmetic number, because the mean of its divisors is an integer number (1278801).

2^2557601 is an apocalyptic number.

It is an amenable number.

2557601 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557601 is an equidigital number, since it uses as much as digits as its factorization.

2557601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 2557601 is about 1599.2501367829. The cubic root of 2557601 is about 136.7553307927.

The spelling of 2557601 in words is "two million, five hundred fifty-seven thousand, six hundred one".