528661 has 6 divisors (see below), whose sum is σ = 615030. Its totient is φ = 453096.

The previous prime is 528659. The next prime is 528667. The reversal of 528661 is 166825.

It can be written as a sum of positive squares in only one way, i.e., 442225 + 86436 = 665^2 + 294^2 .

It is not a de Polignac number, because 528661 - 2¹ = 528659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528667) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5346 + ... + 5443.

It is an arithmetic number, because the mean of its divisors is an integer number (102505).

2⁵²⁸⁶⁶¹ is an apocalyptic number.

It is an amenable number.

528661 is a deficient number, since it is larger than the sum of its proper divisors (86369).

528661 is a wasteful number, since it uses less digits than its factorization.

528661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10803 (or 10796 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 528661 is about 727.0907783764. The cubic root of 528661 is about 80.8585143735.

The spelling of 528661 in words is "five hundred twenty-eight thousand, six hundred sixty-one".