521473 has 4 divisors (see below), whose sum is σ = 522928. Its totient is φ = 520020.

The previous prime is 521471. The next prime is 521483. The reversal of 521473 is 374125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 521473 - 2¹ = 521471 is a prime.

It is a Duffinian number.

521473 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (521471) 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, 238 + ... + 1048.

It is an arithmetic number, because the mean of its divisors is an integer number (130732).

2⁵²¹⁴⁷³ is an apocalyptic number.

It is an amenable number.

521473 is a deficient number, since it is larger than the sum of its proper divisors (1455).

521473 is an equidigital number, since it uses as much as digits as its factorization.

521473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454.

The product of its digits is 840, while the sum is 22.

The square root of 521473 is about 722.1308745650. The cubic root of 521473 is about 80.4903734486.

Adding to 521473 its reverse (374125), we get a palindrome (895598).

The spelling of 521473 in words is "five hundred twenty-one thousand, four hundred seventy-three".