521984 has 18 divisors (see below), whose sum is σ = 1042440. Its totient is φ = 260864.

The previous prime is 521981. The next prime is 521993. The reversal of 521984 is 489125.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 764 + ... + 1275.

2⁵²¹⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

521984 is a deficient number, since it is larger than the sum of its proper divisors (520456).

521984 is an equidigital number, since it uses as much as digits as its factorization.

521984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055 (or 2041 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 521984 is about 722.4846019120. The cubic root of 521984 is about 80.5166561474.

The spelling of 521984 in words is "five hundred twenty-one thousand, nine hundred eighty-four".