2557887 has 8 divisors (see below), whose sum is σ = 3528240. Its totient is φ = 1646400.

The previous prime is 2557879. The next prime is 2557889. The reversal of 2557887 is 7887552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2557887 - 2³ = 2557879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14614 + ... + 14787.

It is an arithmetic number, because the mean of its divisors is an integer number (441030).

2^2557887 is an apocalyptic number.

2557887 is a deficient number, since it is larger than the sum of its proper divisors (970353).

2557887 is a wasteful number, since it uses less digits than its factorization.

2557887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29433.

The product of its digits is 156800, while the sum is 42.

The square root of 2557887 is about 1599.3395511898. The cubic root of 2557887 is about 136.7604280912.

The spelling of 2557887 in words is "two million, five hundred fifty-seven thousand, eight hundred eighty-seven".