565765 has 4 divisors (see below), whose sum is σ = 678924. Its totient is φ = 452608.

The previous prime is 565727. The next prime is 565769. The reversal of 565765 is 567565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 567565 = 5 ⋅113513.

It can be written as a sum of positive squares in 2 ways, for example, as 173889 + 391876 = 417^2 + 626^2 .

It is a cyclic number.

It is not a de Polignac number, because 565765 - 2⁷ = 565637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 565765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565769) 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, 56572 + ... + 56581.

It is an arithmetic number, because the mean of its divisors is an integer number (169731).

2⁵⁶⁵⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

565765 is a deficient number, since it is larger than the sum of its proper divisors (113159).

565765 is a wasteful number, since it uses less digits than its factorization.

565765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113158.

The product of its digits is 31500, while the sum is 34.

The square root of 565765 is about 752.1735172153. The cubic root of 565765 is about 82.7075886392.

The spelling of 565765 in words is "five hundred sixty-five thousand, seven hundred sixty-five".