525899 has 4 divisors (see below), whose sum is σ = 573720. Its totient is φ = 478080.

The previous prime is 525893. The next prime is 525913. The reversal of 525899 is 998525.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525893) 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, 23894 + ... + 23915.

It is an arithmetic number, because the mean of its divisors is an integer number (143430).

2⁵²⁵⁸⁹⁹ is an apocalyptic number.

525899 is a deficient number, since it is larger than the sum of its proper divisors (47821).

525899 is a wasteful number, since it uses less digits than its factorization.

525899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47820.

The product of its digits is 32400, while the sum is 38.

The square root of 525899 is about 725.1889408975. The cubic root of 525899 is about 80.7174527844.

The spelling of 525899 in words is "five hundred twenty-five thousand, eight hundred ninety-nine".