525439 has 2 divisors, whose sum is σ = 525440. Its totient is φ = 525438.

The previous prime is 525433. The next prime is 525457. The reversal of 525439 is 934525.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 525439 - 2³ = 525431 is a prime.

It is a super-2 number, since 2×525439² = 552172285442, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262719 + 262720.

It is an arithmetic number, because the mean of its divisors is an integer number (262720).

2⁵²⁵⁴³⁹ is an apocalyptic number.

525439 is a deficient number, since it is larger than the sum of its proper divisors (1).

525439 is an equidigital number, since it uses as much as digits as its factorization.

525439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 28.

The square root of 525439 is about 724.8717127879. The cubic root of 525439 is about 80.6939115979.

The spelling of 525439 in words is "five hundred twenty-five thousand, four hundred thirty-nine".