521886 has 8 divisors (see below), whose sum is σ = 1043784. Its totient is φ = 173960.

The previous prime is 521881. The next prime is 521887. The reversal of 521886 is 688125.

It is a sphenic number, since it is the product of 3 distinct primes.

521886 is an admirable number.

It is a Curzon number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 43485 + ... + 43496.

It is an arithmetic number, because the mean of its divisors is an integer number (130473).

2⁵²¹⁸⁸⁶ is an apocalyptic number.

521886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521886 is a wasteful number, since it uses less digits than its factorization.

521886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86986.

The product of its digits is 3840, while the sum is 30.

The square root of 521886 is about 722.4167772138. The cubic root of 521886 is about 80.5116169596.

The spelling of 521886 in words is "five hundred twenty-one thousand, eight hundred eighty-six".