2557265 has 4 divisors (see below), whose sum is σ = 3068724. Its totient is φ = 2045808.

The previous prime is 2557241. The next prime is 2557273. The reversal of 2557265 is 5627552.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1157776 + 1399489 = 1076^2 + 1183^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557265 - 2⁶ = 2557201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255722 + ... + 255731.

It is an arithmetic number, because the mean of its divisors is an integer number (767181).

2^2557265 is an apocalyptic number.

It is an amenable number.

2557265 is a deficient number, since it is larger than the sum of its proper divisors (511459).

2557265 is an equidigital number, since it uses as much as digits as its factorization.

2557265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511458.

The product of its digits is 21000, while the sum is 32.

The square root of 2557265 is about 1599.1450840996. The cubic root of 2557265 is about 136.7493418727.

The spelling of 2557265 in words is "two million, five hundred fifty-seven thousand, two hundred sixty-five".