2557279 has 2 divisors, whose sum is σ = 2557280. Its totient is φ = 2557278.

The previous prime is 2557277. The next prime is 2557297. The reversal of 2557279 is 9727552.

Together with next prime (2557297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2557279 - 2¹ = 2557277 is a prime.

Together with 2557277, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278639 + 1278640.

It is an arithmetic number, because the mean of its divisors is an integer number (1278640).

2^2557279 is an apocalyptic number.

2557279 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557279 is an equidigital number, since it uses as much as digits as its factorization.

2557279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 37.

The square root of 2557279 is about 1599.1494614325. The cubic root of 2557279 is about 136.7495914215.

It can be divided in two parts, 25572 and 79, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 2557279 in words is "two million, five hundred fifty-seven thousand, two hundred seventy-nine".