2557402 has 4 divisors (see below), whose sum is σ = 3836106. Its totient is φ = 1278700.

The previous prime is 2557397. The next prime is 2557417. The reversal of 2557402 is 2047552.

2557402 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., 1934881 + 622521 = 1391^2 + 789^2 .

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, 639349 + ... + 639352.

2^2557402 is an apocalyptic number.

2557402 is a deficient number, since it is larger than the sum of its proper divisors (1278704).

2557402 is a wasteful number, since it uses less digits than its factorization.

2557402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278703.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 2557402 is about 1599.1879189138. The cubic root of 2557402 is about 136.7517838469.

The spelling of 2557402 in words is "two million, five hundred fifty-seven thousand, four hundred two".