528505 has 4 divisors (see below), whose sum is σ = 634212. Its totient is φ = 422800.

The previous prime is 528491. The next prime is 528509. The reversal of 528505 is 505825.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 139129 + 389376 = 373^2 + 624^2 .

It is not a de Polignac number, because 528505 - 2⁹ = 527993 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 528505.

It is not an unprimeable number, because it can be changed into a prime (528509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52846 + ... + 52855.

It is an arithmetic number, because the mean of its divisors is an integer number (158553).

2⁵²⁸⁵⁰⁵ is an apocalyptic number.

It is an amenable number.

528505 is a deficient number, since it is larger than the sum of its proper divisors (105707).

528505 is a wasteful number, since it uses less digits than its factorization.

528505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105706.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 528505 is about 726.9834936228. The cubic root of 528505 is about 80.8505602093.

The spelling of 528505 in words is "five hundred twenty-eight thousand, five hundred five".