521875 has 12 divisors (see below), whose sum is σ = 656208. Its totient is φ = 415000.

The previous prime is 521869. The next prime is 521879. The reversal of 521875 is 578125.

It is not a de Polignac number, because 521875 - 2⁹ = 521363 is a prime.

It is a Duffinian number.

521875 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (521879) 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 11 ways as a sum of consecutive naturals, for example, 3042 + ... + 3208.

It is an arithmetic number, because the mean of its divisors is an integer number (54684).

2⁵²¹⁸⁷⁵ is an apocalyptic number.

521875 is a deficient number, since it is larger than the sum of its proper divisors (134333).

521875 is an frugal number, since it uses more digits than its factorization.

521875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 172 counting only the distinct ones).

The product of its digits is 2800, while the sum is 28.

The square root of 521875 is about 722.4091638400. The cubic root of 521875 is about 80.5110512971.

The spelling of 521875 in words is "five hundred twenty-one thousand, eight hundred seventy-five".