2556899 has 4 divisors (see below), whose sum is σ = 2560536. Its totient is φ = 2553264.

The previous prime is 2556877. The next prime is 2556907. The reversal of 2556899 is 9986552.

2556899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2556899 - 2²⁰ = 1508323 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10 and base 15.

It is not an unprimeable number, because it can be changed into a prime (2556839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389 + ... + 2294.

It is an arithmetic number, because the mean of its divisors is an integer number (640134).

2^2556899 is an apocalyptic number.

2556899 is a deficient number, since it is larger than the sum of its proper divisors (3637).

2556899 is an equidigital number, since it uses as much as digits as its factorization.

2556899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3636.

The product of its digits is 194400, while the sum is 44.

The square root of 2556899 is about 1599.0306438590. The cubic root of 2556899 is about 136.7428176307.

The spelling of 2556899 in words is "two million, five hundred fifty-six thousand, eight hundred ninety-nine".