421201423 has 4 divisors (see below), whose sum is σ = 435725640. Its totient is φ = 406677208.

The previous prime is 421201421. The next prime is 421201471. The reversal of 421201423 is 324102124.

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

It is not a de Polignac number, because 421201423 - 2¹ = 421201421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421201423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421201421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7262065 + ... + 7262122.

It is an arithmetic number, because the mean of its divisors is an integer number (108931410).

Almost surely, 2^421201423 is an apocalyptic number.

421201423 is a deficient number, since it is larger than the sum of its proper divisors (14524217).

421201423 is a wasteful number, since it uses less digits than its factorization.

421201423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14524216.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 421201423 is about 20523.1923199097. The cubic root of 421201423 is about 749.6006306358.

Adding to 421201423 its reverse (324102124), we get a palindrome (745303547).

The spelling of 421201423 in words is "four hundred twenty-one million, two hundred one thousand, four hundred twenty-three".