2556604 has 6 divisors (see below), whose sum is σ = 4474064. Its totient is φ = 1278300.

The previous prime is 2556577. The next prime is 2556607. The reversal of 2556604 is 4066552.

2556604 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁷ + 5⁹ + 6 + 6² + 0 + 4⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319572 + ... + 319579.

2^2556604 is an apocalyptic number.

It is an amenable number.

2556604 is a deficient number, since it is larger than the sum of its proper divisors (1917460).

2556604 is a wasteful number, since it uses less digits than its factorization.

2556604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639155 (or 639153 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 2556604 is about 1598.9383978127. The cubic root of 2556604 is about 136.7375585672.

It can be divided in two parts, 2556 and 604, that added together give a triangular number (3160 = T₇₉).

The spelling of 2556604 in words is "two million, five hundred fifty-six thousand, six hundred four".