521532 has 48 divisors (see below), whose sum is σ = 1478400. Its totient is φ = 157680.

The previous prime is 521527. The next prime is 521533. The reversal of 521532 is 235125.

It is a happy number.

521532 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521533) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 969 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (30800).

2⁵²¹⁵³² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (739200).

521532 is an abundant number, since it is smaller than the sum of its proper divisors (956868).

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

521532 is a wasteful number, since it uses less digits than its factorization.

521532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 455 counting only the distinct ones).

The product of its digits is 300, while the sum is 18.

The square root of 521532 is about 722.1717247303. The cubic root of 521532 is about 80.4934089224.

Adding to 521532 its reverse (235125), we get a palindrome (756657).

The spelling of 521532 in words is "five hundred twenty-one thousand, five hundred thirty-two".