424421 has 4 divisors (see below), whose sum is σ = 438144. Its totient is φ = 410700.

The previous prime is 424397. The next prime is 424423. The reversal of 424421 is 124424.

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.

It is a cyclic number.

It is not a de Polignac number, because 424421 - 2¹⁸ = 162277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 424421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424423) 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, 6815 + ... + 6876.

It is an arithmetic number, because the mean of its divisors is an integer number (109536).

2⁴²⁴⁴²¹ is an apocalyptic number.

It is an amenable number.

424421 is a deficient number, since it is larger than the sum of its proper divisors (13723).

424421 is a wasteful number, since it uses less digits than its factorization.

424421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13722.

The product of its digits is 256, while the sum is 17.

The square root of 424421 is about 651.4760164427. The cubic root of 424421 is about 75.1505715811.

Adding to 424421 its reverse (124424), we get a palindrome (548845).

The spelling of 424421 in words is "four hundred twenty-four thousand, four hundred twenty-one", and thus it is an iban number.