225604 has 6 divisors (see below), whose sum is σ = 394814. Its totient is φ = 112800.

The previous prime is 225601. The next prime is 225611. The reversal of 225604 is 406522.

It can be written as a sum of positive squares in only one way, i.e., 202500 + 23104 = 450^2 + 152^2 .

It is an Ulam number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (225601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28197 + ... + 28204.

2²²⁵⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

225604 is a deficient number, since it is larger than the sum of its proper divisors (169210).

225604 is a wasteful number, since it uses less digits than its factorization.

225604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56405 (or 56403 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 225604 is about 474.9778942225. The cubic root of 225604 is about 60.8763957730.

The spelling of 225604 in words is "two hundred twenty-five thousand, six hundred four".