521485 has 4 divisors (see below), whose sum is σ = 625788. Its totient is φ = 417184.

The previous prime is 521483. The next prime is 521491. The reversal of 521485 is 584125.

521485 is nontrivially palindromic in base 14.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 249001 + 272484 = 499^2 + 522^2 .

It is a cyclic number.

It is not a de Polignac number, because 521485 - 2¹ = 521483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52144 + ... + 52153.

It is an arithmetic number, because the mean of its divisors is an integer number (156447).

2⁵²¹⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

521485 is a deficient number, since it is larger than the sum of its proper divisors (104303).

521485 is a wasteful number, since it uses less digits than its factorization.

521485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104302.

The product of its digits is 1600, while the sum is 25.

The square root of 521485 is about 722.1391832604. The cubic root of 521485 is about 80.4909908517.

The spelling of 521485 in words is "five hundred twenty-one thousand, four hundred eighty-five".