421330423 has 4 divisors (see below), whose sum is σ = 421372288. Its totient is φ = 421288560.

The previous prime is 421330417. The next prime is 421330439. The reversal of 421330423 is 324033124.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 421330423 - 2⁹ = 421329911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421330394 and 421330403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421330223) 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, 4315 + ... + 29347.

It is an arithmetic number, because the mean of its divisors is an integer number (105343072).

Almost surely, 2^421330423 is an apocalyptic number.

421330423 is a deficient number, since it is larger than the sum of its proper divisors (41865).

421330423 is a wasteful number, since it uses less digits than its factorization.

421330423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41864.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 421330423 is about 20526.3348652408. The cubic root of 421330423 is about 749.6771487464.

Adding to 421330423 its reverse (324033124), we get a palindrome (745363547).

The spelling of 421330423 in words is "four hundred twenty-one million, three hundred thirty thousand, four hundred twenty-three".