522665 has 32 divisors (see below), whose sum is σ = 798336. Its totient is φ = 322560.

The previous prime is 522661. The next prime is 522673. The reversal of 522665 is 566225.

It is a happy number.

It is not a de Polignac number, because 522665 - 2² = 522661 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (522661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12134 + ... + 12176.

It is an arithmetic number, because the mean of its divisors is an integer number (24948).

2⁵²²⁶⁶⁵ is an apocalyptic number.

522665 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

522665 is a deficient number, since it is larger than the sum of its proper divisors (275671).

522665 is a wasteful number, since it uses less digits than its factorization.

522665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89.

The product of its digits is 3600, while the sum is 26.

The square root of 522665 is about 722.9557386175. The cubic root of 522665 is about 80.5516559525.

The spelling of 522665 in words is "five hundred twenty-two thousand, six hundred sixty-five".