505604 has 12 divisors (see below), whose sum is σ = 965328. Its totient is φ = 229800.

The previous prime is 505601. The next prime is 505607. The reversal of 505604 is 406505.

It is an interprime number because it is at equal distance from previous prime (505601) and next prime (505607).

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (505601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5702 + ... + 5789.

It is an arithmetic number, because the mean of its divisors is an integer number (80444).

2⁵⁰⁵⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

505604 is a deficient number, since it is larger than the sum of its proper divisors (459724).

505604 is a wasteful number, since it uses less digits than its factorization.

505604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11506 (or 11504 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 505604 is about 711.0583660994. The cubic root of 505604 is about 79.6654781388.

Subtracting from 505604 its reverse (406505), we obtain a palindrome (99099).

The spelling of 505604 in words is "five hundred five thousand, six hundred four".