421315023 has 4 divisors (see below), whose sum is σ = 561753368. Its totient is φ = 280876680.

The previous prime is 421315021. The next prime is 421315051. The reversal of 421315023 is 320513124.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 421315023 - 2¹ = 421315021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421315021) 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, 70219168 + ... + 70219173.

It is an arithmetic number, because the mean of its divisors is an integer number (140438342).

Almost surely, 2^421315023 is an apocalyptic number.

421315023 is a deficient number, since it is larger than the sum of its proper divisors (140438345).

421315023 is a wasteful number, since it uses less digits than its factorization.

421315023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140438344.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 421315023 is about 20525.9597339564. The cubic root of 421315023 is about 749.6680148473.

Adding to 421315023 its reverse (320513124), we get a palindrome (741828147).

The spelling of 421315023 in words is "four hundred twenty-one million, three hundred fifteen thousand, twenty-three".