528521 has 4 divisors (see below), whose sum is σ = 604032. Its totient is φ = 453012.

The previous prime is 528511. The next prime is 528527. The reversal of 528521 is 125825.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 528521 - 2¹⁴ = 512137 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37745 + ... + 37758.

It is an arithmetic number, because the mean of its divisors is an integer number (151008).

2⁵²⁸⁵²¹ is an apocalyptic number.

It is an amenable number.

528521 is a deficient number, since it is larger than the sum of its proper divisors (75511).

528521 is an equidigital number, since it uses as much as digits as its factorization.

528521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75510.

The product of its digits is 800, while the sum is 23.

The square root of 528521 is about 726.9944979159. The cubic root of 528521 is about 80.8513760931.

The spelling of 528521 in words is "five hundred twenty-eight thousand, five hundred twenty-one".