2556799 has 4 divisors (see below), whose sum is σ = 2922064. Its totient is φ = 2191536.

The previous prime is 2556793. The next prime is 2556803. The reversal of 2556799 is 9976552.

It is a happy number.

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 2556799 - 2³ = 2556791 is a prime.

It is a super-2 number, since 2×2556799² = 13074442252802, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182622 + ... + 182635.

It is an arithmetic number, because the mean of its divisors is an integer number (730516).

2^2556799 is an apocalyptic number.

2556799 is a deficient number, since it is larger than the sum of its proper divisors (365265).

2556799 is an equidigital number, since it uses as much as digits as its factorization.

2556799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365264.

The product of its digits is 170100, while the sum is 43.

The square root of 2556799 is about 1598.9993746090. Note that the first 3 decimals coincide. The cubic root of 2556799 is about 136.7410349426.

The spelling of 2556799 in words is "two million, five hundred fifty-six thousand, seven hundred ninety-nine".