2556913 has 2 divisors, whose sum is σ = 2556914. Its totient is φ = 2556912.

The previous prime is 2556907. The next prime is 2556943. The reversal of 2556913 is 3196552.

2556913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2211169 + 345744 = 1487^2 + 588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556913 is a prime.

It is not a weakly prime, because it can be changed into another prime (2556943) 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 as a sum of consecutive naturals, namely, 1278456 + 1278457.

It is an arithmetic number, because the mean of its divisors is an integer number (1278457).

2^2556913 is an apocalyptic number.

It is an amenable number.

2556913 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556913 is an equidigital number, since it uses as much as digits as its factorization.

2556913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 31.

The square root of 2556913 is about 1599.0350215052. The cubic root of 2556913 is about 136.7430672033.

The spelling of 2556913 in words is "two million, five hundred fifty-six thousand, nine hundred thirteen".