565165 has 16 divisors (see below), whose sum is σ = 736560. Its totient is φ = 414720.

The previous prime is 565163. The next prime is 565171. The reversal of 565165 is 561565.

565165 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 8 ways, for example, as 8649 + 556516 = 93^2 + 746^2 .

It is not a de Polignac number, because 565165 - 2¹ = 565163 is a prime.

It is a super-2 number, since 2×565165² = 638822954450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5131 + ... + 5239.

It is an arithmetic number, because the mean of its divisors is an integer number (46035).

2⁵⁶⁵¹⁶⁵ is an apocalyptic number.

It is an amenable number.

565165 is a deficient number, since it is larger than the sum of its proper divisors (171395).

565165 is a wasteful number, since it uses less digits than its factorization.

565165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192.

The product of its digits is 4500, while the sum is 28.

The square root of 565165 is about 751.7745672740. The cubic root of 565165 is about 82.6783408620.

Subtracting from 565165 its reverse (561565), we obtain a square (3600 = 60²).

The spelling of 565165 in words is "five hundred sixty-five thousand, one hundred sixty-five".