424521 has 12 divisors (see below), whose sum is σ = 636272. Its totient is φ = 282852.

The previous prime is 424519. The next prime is 424537. The reversal of 424521 is 125424.

It is not a de Polignac number, because 424521 - 2¹ = 424519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 424494 and 424503.

It is not an unprimeable number, because it can be changed into a prime (424121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 631 + ... + 1116.

2⁴²⁴⁵²¹ is an apocalyptic number.

It is an amenable number.

424521 is a deficient number, since it is larger than the sum of its proper divisors (211751).

424521 is an equidigital number, since it uses as much as digits as its factorization.

424521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762 (or 1750 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 424521 is about 651.5527607186. The cubic root of 424521 is about 75.1564733210.

Adding to 424521 its reverse (125424), we get a palindrome (549945).

The spelling of 424521 in words is "four hundred twenty-four thousand, five hundred twenty-one".