521325 has 36 divisors (see below), whose sum is σ = 1070368. Its totient is φ = 237600.

The previous prime is 521317. The next prime is 521329. The reversal of 521325 is 523125.

It is a happy number.

It is not a de Polignac number, because 521325 - 2³ = 521317 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 521298 and 521307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1410 + ... + 1740.

2⁵²¹³²⁵ is an apocalyptic number.

It is an amenable number.

521325 is an abundant number, since it is smaller than the sum of its proper divisors (549043).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521325 is a wasteful number, since it uses less digits than its factorization.

521325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 346 counting only the distinct ones).

The product of its digits is 300, while the sum is 18.

The square root of 521325 is about 722.0283927935. The cubic root of 521325 is about 80.4827580320.

The spelling of 521325 in words is "five hundred twenty-one thousand, three hundred twenty-five".