2556542 has 16 divisors (see below), whose sum is σ = 4039200. Its totient is φ = 1211232.

The previous prime is 2556523. The next prime is 2556559. The reversal of 2556542 is 2456552.

2556542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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 in 7 ways as a sum of consecutive naturals, for example, 6668 + ... + 7040.

It is an arithmetic number, because the mean of its divisors is an integer number (252450).

2^2556542 is an apocalyptic number.

2556542 is a deficient number, since it is larger than the sum of its proper divisors (1482658).

2556542 is a wasteful number, since it uses less digits than its factorization.

2556542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547.

The product of its digits is 12000, while the sum is 29.

The square root of 2556542 is about 1598.9190098313. The cubic root of 2556542 is about 136.7364532210.

The spelling of 2556542 in words is "two million, five hundred fifty-six thousand, five hundred forty-two".