2556497 has 4 divisors (see below), whose sum is σ = 2592576. Its totient is φ = 2520420.

The previous prime is 2556493. The next prime is 2556503. The reversal of 2556497 is 7946552.

It is a happy number.

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 2556497 - 2² = 2556493 is a prime.

It is a super-2 number, since 2×2556497² = 13071353822018, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2556497.

It is not an unprimeable number, because it can be changed into a prime (2556493) 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, 17933 + ... + 18074.

It is an arithmetic number, because the mean of its divisors is an integer number (648144).

2^2556497 is an apocalyptic number.

It is an amenable number.

2556497 is a deficient number, since it is larger than the sum of its proper divisors (36079).

2556497 is an equidigital number, since it uses as much as digits as its factorization.

2556497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36078.

The product of its digits is 75600, while the sum is 38.

The square root of 2556497 is about 1598.9049377621. The cubic root of 2556497 is about 136.7356509425.

The spelling of 2556497 in words is "two million, five hundred fifty-six thousand, four hundred ninety-seven".