525839 has 2 divisors, whose sum is σ = 525840. Its totient is φ = 525838.

The previous prime is 525817. The next prime is 525869. The reversal of 525839 is 938525.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 525839 - 2⁸ = 525583 is a prime.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 525839.

It is not a weakly prime, because it can be changed into another prime (525809) 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 as a sum of consecutive naturals, namely, 262919 + 262920.

It is an arithmetic number, because the mean of its divisors is an integer number (262920).

2⁵²⁵⁸³⁹ is an apocalyptic number.

525839 is a deficient number, since it is larger than the sum of its proper divisors (1).

525839 is an equidigital number, since it uses as much as digits as its factorization.

525839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 32.

The square root of 525839 is about 725.1475711881. The cubic root of 525839 is about 80.7143829735.

Subtracting 525839 from its reverse (938525), we obtain a triangular number (412686 = T₉₀₈).

The spelling of 525839 in words is "five hundred twenty-five thousand, eight hundred thirty-nine".