2605604 has 6 divisors (see below), whose sum is σ = 4559814. Its totient is φ = 1302800.

The previous prime is 2605579. The next prime is 2605609. The reversal of 2605604 is 4065062.

It can be written as a sum of positive squares in only one way, i.e., 1965604 + 640000 = 1402^2 + 800^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2605604.

It is not an unprimeable number, because it can be changed into a prime (2605609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325697 + ... + 325704.

It is an arithmetic number, because the mean of its divisors is an integer number (759969).

2^2605604 is an apocalyptic number.

It is an amenable number.

2605604 is a deficient number, since it is larger than the sum of its proper divisors (1954210).

2605604 is a wasteful number, since it uses less digits than its factorization.

2605604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651405 (or 651403 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2605604 is about 1614.1883409318. The cubic root of 2605604 is about 137.6056092224.

The spelling of 2605604 in words is "two million, six hundred five thousand, six hundred four".