521493 has 16 divisors (see below), whose sum is σ = 837120. Its totient is φ = 282096.

The previous prime is 521491. The next prime is 521497. The reversal of 521493 is 394125.

It is not a de Polignac number, because 521493 - 2¹ = 521491 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 521493.

It is not an unprimeable number, because it can be changed into a prime (521491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255 + ... + 1052.

It is an arithmetic number, because the mean of its divisors is an integer number (52320).

2⁵²¹⁴⁹³ is an apocalyptic number.

It is an amenable number.

521493 is a deficient number, since it is larger than the sum of its proper divisors (315627).

521493 is a wasteful number, since it uses less digits than its factorization.

521493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336.

The product of its digits is 1080, while the sum is 24.

The square root of 521493 is about 722.1447223376. The cubic root of 521493 is about 80.4914024484.

The spelling of 521493 in words is "five hundred twenty-one thousand, four hundred ninety-three".