421322423 has 4 divisors (see below), whose sum is σ = 422295888. Its totient is φ = 420348960.

The previous prime is 421322417. The next prime is 421322443. The reversal of 421322423 is 324223124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421322423 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 (421322443) 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, 486083 + ... + 486948.

It is an arithmetic number, because the mean of its divisors is an integer number (105573972).

Almost surely, 2^421322423 is an apocalyptic number.

421322423 is a deficient number, since it is larger than the sum of its proper divisors (973465).

421322423 is an equidigital number, since it uses as much as digits as its factorization.

421322423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973464.

The product of its digits is 2304, while the sum is 23.

The square root of 421322423 is about 20526.1399927020. The cubic root of 421322423 is about 749.6724038915.

Adding to 421322423 its reverse (324223124), we get a palindrome (745545547).

The spelling of 421322423 in words is "four hundred twenty-one million, three hundred twenty-two thousand, four hundred twenty-three".