2565457 has 4 divisors (see below), whose sum is σ = 2581360. Its totient is φ = 2549556.

The previous prime is 2565449. The next prime is 2565461. The reversal of 2565457 is 7545652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2565457 - 2³ = 2565449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7707 + ... + 8032.

It is an arithmetic number, because the mean of its divisors is an integer number (645340).

2^2565457 is an apocalyptic number.

It is an amenable number.

2565457 is a deficient number, since it is larger than the sum of its proper divisors (15903).

2565457 is a wasteful number, since it uses less digits than its factorization.

2565457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15902.

The product of its digits is 42000, while the sum is 34.

The square root of 2565457 is about 1601.7044046890. The cubic root of 2565457 is about 136.8952081948.

The spelling of 2565457 in words is "two million, five hundred sixty-five thousand, four hundred fifty-seven".