2560257 has 12 divisors (see below), whose sum is σ = 4226560. Its totient is φ = 1462968.

The previous prime is 2560247. The next prime is 2560273. The reversal of 2560257 is 7520652.

2560257 is a `hidden beast` number, since 2 + 5 + 602 + 57 = 666.

It is not a de Polignac number, because 2560257 - 2¹² = 2556161 is a prime.

It is a Duffinian number.

2560257 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2560257.

It is not an unprimeable number, because it can be changed into a prime (2560247) 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 in 11 ways as a sum of consecutive naturals, for example, 20257 + ... + 20382.

2^2560257 is an apocalyptic number.

It is an amenable number.

2560257 is a deficient number, since it is larger than the sum of its proper divisors (1666303).

2560257 is a wasteful number, since it uses less digits than its factorization.

2560257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40652 (or 40649 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 2560257 is about 1600.0803104844. The cubic root of 2560257 is about 136.8026533291.

The spelling of 2560257 in words is "two million, five hundred sixty thousand, two hundred fifty-seven".