2557426 has 4 divisors (see below), whose sum is σ = 3836142. Its totient is φ = 1278712.

The previous prime is 2557417. The next prime is 2557433. The reversal of 2557426 is 6247552.

2557426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2556801 + 625 = 1599^2 + 25^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 639355 + ... + 639358.

2^2557426 is an apocalyptic number.

2557426 is a deficient number, since it is larger than the sum of its proper divisors (1278716).

2557426 is a wasteful number, since it uses less digits than its factorization.

2557426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278715.

The product of its digits is 16800, while the sum is 31.

The square root of 2557426 is about 1599.1954227048. The cubic root of 2557426 is about 136.7522116290.

It can be divided in two parts, 25574 and 26, that added together give a square (25600 = 160²).

The spelling of 2557426 in words is "two million, five hundred fifty-seven thousand, four hundred twenty-six".