525399 has 16 divisors (see below), whose sum is σ = 811008. Its totient is φ = 296352.

The previous prime is 525397. The next prime is 525409. The reversal of 525399 is 993525.

It is not a de Polignac number, because 525399 - 2¹ = 525397 is a prime.

It is a d-powerful number, because it can be written as 5 + 2¹⁹ + 3⁵ + 5³ + 9 + 9³ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525391) 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 15 ways as a sum of consecutive naturals, for example, 2569 + ... + 2765.

It is an arithmetic number, because the mean of its divisors is an integer number (50688).

2⁵²⁵³⁹⁹ is an apocalyptic number.

525399 is a deficient number, since it is larger than the sum of its proper divisors (285609).

525399 is a wasteful number, since it uses less digits than its factorization.

525399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334.

The product of its digits is 12150, while the sum is 33.

The square root of 525399 is about 724.8441211736. The cubic root of 525399 is about 80.6918638889.

The spelling of 525399 in words is "five hundred twenty-five thousand, three hundred ninety-nine".