564565 has 4 divisors (see below), whose sum is σ = 677484. Its totient is φ = 451648.

The previous prime is 564533. The next prime is 564593. The reversal of 564565 is 565465.

564565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565465 = 5 ⋅113093.

It can be written as a sum of positive squares in 2 ways, for example, as 339889 + 224676 = 583^2 + 474^2 .

It is a cyclic number.

It is not a de Polignac number, because 564565 - 2⁵ = 564533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56452 + ... + 56461.

It is an arithmetic number, because the mean of its divisors is an integer number (169371).

2⁵⁶⁴⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

564565 is a deficient number, since it is larger than the sum of its proper divisors (112919).

564565 is a wasteful number, since it uses less digits than its factorization.

564565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112918.

The product of its digits is 18000, while the sum is 31.

The square root of 564565 is about 751.3754055065. The cubic root of 564565 is about 82.6490723771.

Subtracting 564565 from its reverse (565465), we obtain a square (900 = 30²).

The spelling of 564565 in words is "five hundred sixty-four thousand, five hundred sixty-five".