525990 has 32 divisors (see below), whose sum is σ = 1283040. Its totient is φ = 137984.

The previous prime is 525983. The next prime is 526027. The reversal of 525990 is 99525.

It is a super-3 number, since 3×525990³ = 436569827633397000, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

525990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 15 ways as a sum of consecutive naturals, for example, 2572 + ... + 2768.

It is an arithmetic number, because the mean of its divisors is an integer number (40095).

2⁵²⁵⁹⁹⁰ is an apocalyptic number.

525990 is an abundant number, since it is smaller than the sum of its proper divisors (757050).

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

525990 is a wasteful number, since it uses less digits than its factorization.

525990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 525990 is about 725.2516804531. The cubic root of 525990 is about 80.7221082186.

The spelling of 525990 in words is "five hundred twenty-five thousand, nine hundred ninety".