2557557 has 6 divisors (see below), whose sum is σ = 3694262. Its totient is φ = 1705032.

The previous prime is 2557553. The next prime is 2557561. The reversal of 2557557 is 7557552.

2557557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2557553) and next prime (2557561).

It can be written as a sum of positive squares in only one way, i.e., 2047761 + 509796 = 1431^2 + 714^2 .

It is not a de Polignac number, because 2557557 - 2² = 2557553 is a prime.

It is a Duffinian number.

2557557 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557553) 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 in 5 ways as a sum of consecutive naturals, for example, 142078 + ... + 142095.

2^2557557 is an apocalyptic number.

It is an amenable number.

2557557 is a deficient number, since it is larger than the sum of its proper divisors (1136705).

2557557 is a wasteful number, since it uses less digits than its factorization.

2557557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284179 (or 284176 counting only the distinct ones).

The product of its digits is 61250, while the sum is 36.

The square root of 2557557 is about 1599.2363802765. The cubic root of 2557557 is about 136.7545465592.

The spelling of 2557557 in words is "two million, five hundred fifty-seven thousand, five hundred fifty-seven".