525390 has 32 divisors (see below), whose sum is σ = 1282176. Its totient is φ = 137760.

The previous prime is 525379. The next prime is 525391. The reversal of 525390 is 93525.

It is a d-powerful number, because it can be written as 5 + 2¹⁹ + 3⁵ + 5³ + 9³ + 0 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 525390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525391) by changing a digit.

525390 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2385 + ... + 2595.

It is an arithmetic number, because the mean of its divisors is an integer number (40068).

2⁵²⁵³⁹⁰ is an apocalyptic number.

525390 is an abundant number, since it is smaller than the sum of its proper divisors (756786).

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

525390 is a wasteful number, since it uses less digits than its factorization.

525390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304.

The product of its (nonzero) digits is 1350, while the sum is 24.

The square root of 525390 is about 724.8379129157. The cubic root of 525390 is about 80.6914031401.

The spelling of 525390 in words is "five hundred twenty-five thousand, three hundred ninety".