1804564 has 24 divisors (see below), whose sum is σ = 3303720. Its totient is φ = 861696.

The previous prime is 1804559. The next prime is 1804577. The reversal of 1804564 is 4654081.

It can be written as a sum of positive squares in 4 ways, for example, as 412164 + 1392400 = 642^2 + 1180^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13104 + ... + 13240.

It is an arithmetic number, because the mean of its divisors is an integer number (137655).

2^1804564 is an apocalyptic number.

It is an amenable number.

1804564 is a deficient number, since it is larger than the sum of its proper divisors (1499156).

1804564 is a wasteful number, since it uses less digits than its factorization.

1804564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1804564 is about 1343.3406120564. The cubic root of 1804564 is about 121.7467648791.

The spelling of 1804564 in words is "one million, eight hundred four thousand, five hundred sixty-four".