521885 has 32 divisors (see below), whose sum is σ = 817152. Its totient is φ = 311040.

The previous prime is 521881. The next prime is 521887. The reversal of 521885 is 588125.

It is not a de Polignac number, because 521885 - 2² = 521881 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521885.

It is not an unprimeable number, because it can be changed into a prime (521881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14087 + ... + 14123.

It is an arithmetic number, because the mean of its divisors is an integer number (25536).

2⁵²¹⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

521885 is a deficient number, since it is larger than the sum of its proper divisors (295267).

521885 is a wasteful number, since it uses less digits than its factorization.

521885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93.

The product of its digits is 3200, while the sum is 29.

The square root of 521885 is about 722.4160850922. The cubic root of 521885 is about 80.5115655361.

The spelling of 521885 in words is "five hundred twenty-one thousand, eight hundred eighty-five".