421423321 has 8 divisors (see below), whose sum is σ = 463953600. Its totient is φ = 379596240.

The previous prime is 421423313. The next prime is 421423339. The reversal of 421423321 is 123324124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421423321 - 2³ = 421423313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421423292 and 421423301.

It is not an unprimeable number, because it can be changed into a prime (421423351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174541 + ... + 176938.

It is an arithmetic number, because the mean of its divisors is an integer number (57994200).

Almost surely, 2^421423321 is an apocalyptic number.

It is an amenable number.

421423321 is a deficient number, since it is larger than the sum of its proper divisors (42530279).

421423321 is a wasteful number, since it uses less digits than its factorization.

421423321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351599.

The product of its digits is 1152, while the sum is 22.

The square root of 421423321 is about 20528.5976384165. The cubic root of 421423321 is about 749.7322427898.

Adding to 421423321 its reverse (123324124), we get a palindrome (544747445).

The spelling of 421423321 in words is "four hundred twenty-one million, four hundred twenty-three thousand, three hundred twenty-one".