424204321 has 6 divisors (see below), whose sum is σ = 425484150. Its totient is φ = 422928288.

The previous prime is 424204301. The next prime is 424204351. The reversal of 424204321 is 123402424.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 18584721 + 405619600 = 4311^2 + 20140^2 .

It is not a de Polignac number, because 424204321 - 2²³ = 415815713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 424204292 and 424204301.

It is not an unprimeable number, because it can be changed into a prime (424204301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 137605 + ... + 140653.

It is an arithmetic number, because the mean of its divisors is an integer number (70914025).

Almost surely, 2^424204321 is an apocalyptic number.

It is an amenable number.

424204321 is a deficient number, since it is larger than the sum of its proper divisors (1279829).

424204321 is an frugal number, since it uses more digits than its factorization.

424204321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3795 (or 3422 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 424204321 is about 20596.2210368796. The cubic root of 424204321 is about 751.3778056891.

Adding to 424204321 its reverse (123402424), we get a palindrome (547606745).

The spelling of 424204321 in words is "four hundred twenty-four million, two hundred four thousand, three hundred twenty-one".