2557556 has 12 divisors (see below), whose sum is σ = 4492068. Its totient is φ = 1274112.

The previous prime is 2557553. The next prime is 2557561. The reversal of 2557556 is 6557552.

It can be written as a sum of positive squares in 2 ways, for example, as 1069156 + 1488400 = 1034^2 + 1220^2 .

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260 + ... + 2276.

It is an arithmetic number, because the mean of its divisors is an integer number (374339).

2^2557556 is an apocalyptic number.

It is an amenable number.

2557556 is a deficient number, since it is larger than the sum of its proper divisors (1934512).

2557556 is a wasteful number, since it uses less digits than its factorization.

2557556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338 (or 2336 counting only the distinct ones).

The product of its digits is 52500, while the sum is 35.

The square root of 2557556 is about 1599.2360676273. The cubic root of 2557556 is about 136.7545287356.

It can be divided in two parts, 2557 and 556, that added together give a palindrome (3113).

The spelling of 2557556 in words is "two million, five hundred fifty-seven thousand, five hundred fifty-six".