521682 has 16 divisors (see below), whose sum is σ = 1192512. Its totient is φ = 149040.

The previous prime is 521671. The next prime is 521693. The reversal of 521682 is 286125.

It is an interprime number because it is at equal distance from previous prime (521671) and next prime (521693).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6169 + ... + 6252.

It is an arithmetic number, because the mean of its divisors is an integer number (74532).

2⁵²¹⁶⁸² is an apocalyptic number.

521682 is an abundant number, since it is smaller than the sum of its proper divisors (670830).

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

521682 is a wasteful number, since it uses less digits than its factorization.

521682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12433.

The product of its digits is 960, while the sum is 24.

The square root of 521682 is about 722.2755706792. The cubic root of 521682 is about 80.5011251981.

The spelling of 521682 in words is "five hundred twenty-one thousand, six hundred eighty-two".