565504 has 27 divisors (see below), whose sum is σ = 1153327. Its totient is φ = 276736.

The previous prime is 565489. The next prime is 565507. The reversal of 565504 is 405565.

The square root of 565504 is 752.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (565507) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 12009 + ... + 12055.

2⁵⁶⁵⁵⁰⁴ is an apocalyptic number.

565504 is the 752-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 565504

565504 is an abundant number, since it is smaller than the sum of its proper divisors (587823).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

565504 is an frugal number, since it uses more digits than its factorization.

565504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 49 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The cubic root of 565504 is about 82.6948683985.

Multiplying 565504 by its sum of digits (25), we get a square (14137600 = 3760²).

The spelling of 565504 in words is "five hundred sixty-five thousand, five hundred four".