2557879 has 2 divisors, whose sum is σ = 2557880. Its totient is φ = 2557878.

The previous prime is 2557861. The next prime is 2557889. The reversal of 2557879 is 9787552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2557879 - 2⁹ = 2557367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557889) 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 as a sum of consecutive naturals, namely, 1278939 + 1278940.

It is an arithmetic number, because the mean of its divisors is an integer number (1278940).

2^2557879 is an apocalyptic number.

2557879 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557879 is an equidigital number, since it uses as much as digits as its factorization.

2557879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 43.

The square root of 2557879 is about 1599.3370501555. The cubic root of 2557879 is about 136.7602855145.

The spelling of 2557879 in words is "two million, five hundred fifty-seven thousand, eight hundred seventy-nine".