2556977 has 2 divisors, whose sum is σ = 2556978. Its totient is φ = 2556976.

The previous prime is 2556943. The next prime is 2556991. The reversal of 2556977 is 7796552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1739761 + 817216 = 1319^2 + 904^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556977 - 2⁶ = 2556913 is a prime.

It is not a weakly prime, because it can be changed into another prime (2556907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278488 + 1278489.

It is an arithmetic number, because the mean of its divisors is an integer number (1278489).

2^2556977 is an apocalyptic number.

It is an amenable number.

2556977 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556977 is an equidigital number, since it uses as much as digits as its factorization.

2556977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 132300, while the sum is 41.

The square root of 2556977 is about 1599.0550334494. The cubic root of 2556977 is about 136.7442080951.

The spelling of 2556977 in words is "two million, five hundred fifty-six thousand, nine hundred seventy-seven".