525405 has 8 divisors (see below), whose sum is σ = 840672. Its totient is φ = 280208.

The previous prime is 525397. The next prime is 525409. The reversal of 525405 is 504525.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 525405 - 2³ = 525397 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525409) 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 7 ways as a sum of consecutive naturals, for example, 17499 + ... + 17528.

It is an arithmetic number, because the mean of its divisors is an integer number (105084).

2⁵²⁵⁴⁰⁵ is an apocalyptic number.

It is an amenable number.

525405 is a deficient number, since it is larger than the sum of its proper divisors (315267).

525405 is a wasteful number, since it uses less digits than its factorization.

525405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35035.

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 525405 is about 724.8482599827. The cubic root of 525405 is about 80.6921710519.

The spelling of 525405 in words is "five hundred twenty-five thousand, four hundred five".