521382 has 16 divisors (see below), whose sum is σ = 1053360. Its totient is φ = 172032.

The previous prime is 521377. The next prime is 521393. The reversal of 521382 is 283125.

It is a congruent number.

It is an unprimeable number.

521382 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294 + ... + 1062.

It is an arithmetic number, because the mean of its divisors is an integer number (65835).

2⁵²¹³⁸² is an apocalyptic number.

521382 is an abundant number, since it is smaller than the sum of its proper divisors (531978).

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

521382 is a wasteful number, since it uses less digits than its factorization.

521382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887.

The product of its digits is 480, while the sum is 21.

The square root of 521382 is about 722.0678638466. The cubic root of 521382 is about 80.4856911671.

It can be divided in two parts, 521 and 382, that added together give a triangular number (903 = T₄₂).

The spelling of 521382 in words is "five hundred twenty-one thousand, three hundred eighty-two".