423312421 has 8 divisors (see below), whose sum is σ = 493659200. Its totient is φ = 362838924.

The previous prime is 423312397. The next prime is 423312451. The reversal of 423312421 is 124213324.

It is not a de Polignac number, because 423312421 - 2⁷ = 423312293 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 423312392 and 423312401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423312451) 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, 616731 + ... + 617416.

It is an arithmetic number, because the mean of its divisors is an integer number (61707400).

Almost surely, 2^423312421 is an apocalyptic number.

It is an amenable number.

423312421 is a deficient number, since it is larger than the sum of its proper divisors (70346779).

423312421 is an equidigital number, since it uses as much as digits as its factorization.

423312421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234168 (or 1234154 counting only the distinct ones).

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

The square root of 423312421 is about 20574.5576137131. The cubic root of 423312421 is about 750.8508394350.

Adding to 423312421 its reverse (124213324), we get a palindrome (547525745).

The spelling of 423312421 in words is "four hundred twenty-three million, three hundred twelve thousand, four hundred twenty-one".