528921 has 12 divisors (see below), whose sum is σ = 809172. Its totient is φ = 331776.

The previous prime is 528911. The next prime is 528929. The reversal of 528921 is 129825.

It can be written as a sum of positive squares in 2 ways, for example, as 168921 + 360000 = 411^2 + 600^2 .

It is not a de Polignac number, because 528921 - 2¹⁰ = 527897 is a prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 528921.

It is not an unprimeable number, because it can be changed into a prime (528929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1576 + ... + 1881.

It is an arithmetic number, because the mean of its divisors is an integer number (67431).

2⁵²⁸⁹²¹ is an apocalyptic number.

528921 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

528921 is a deficient number, since it is larger than the sum of its proper divisors (280251).

528921 is a wasteful number, since it uses less digits than its factorization.

528921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3480 (or 3477 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 528921 is about 727.2695511294. The cubic root of 528921 is about 80.8717678373.

The spelling of 528921 in words is "five hundred twenty-eight thousand, nine hundred twenty-one".