522565 has 4 divisors (see below), whose sum is σ = 627084. Its totient is φ = 418048.

The previous prime is 522553. The next prime is 522569. The reversal of 522565 is 565225.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 114244 + 408321 = 338^2 + 639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522565 is a prime.

It is a d-powerful number, because it can be written as 5² + 2 + 5⁴ + 2¹⁷ + 6³ + 5⁸ .

It is a Duffinian number.

522565 is a lucky number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (522569) 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, 52252 + ... + 52261.

It is an arithmetic number, because the mean of its divisors is an integer number (156771).

2⁵²²⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

522565 is a deficient number, since it is larger than the sum of its proper divisors (104519).

522565 is a wasteful number, since it uses less digits than its factorization.

522565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104518.

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

The square root of 522565 is about 722.8865747820. The cubic root of 522565 is about 80.5465183855.

The spelling of 522565 in words is "five hundred twenty-two thousand, five hundred sixty-five".