522365 has 4 divisors (see below), whose sum is σ = 626844. Its totient is φ = 417888.

The previous prime is 522337. The next prime is 522371. The reversal of 522365 is 563225.

It is a happy number.

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 401956 + 120409 = 634^2 + 347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-522365 is a prime.

It is a d-powerful number, because it can be written as 5⁴ + 2² + 3 + 2¹⁷ + 6² + 5⁸ .

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 522365.

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, 52232 + ... + 52241.

It is an arithmetic number, because the mean of its divisors is an integer number (156711).

2⁵²²³⁶⁵ is an apocalyptic number.

It is an amenable number.

522365 is a deficient number, since it is larger than the sum of its proper divisors (104479).

522365 is a wasteful number, since it uses less digits than its factorization.

522365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104478.

The product of its digits is 1800, while the sum is 23.

The square root of 522365 is about 722.7482272548. The cubic root of 522365 is about 80.5362412849.

The spelling of 522365 in words is "five hundred twenty-two thousand, three hundred sixty-five".