421404430 has 8 divisors (see below), whose sum is σ = 758527992. Its totient is φ = 168561768.

The previous prime is 421404427. The next prime is 421404443. The reversal of 421404430 is 34404124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21070212 + ... + 21070231.

It is an arithmetic number, because the mean of its divisors is an integer number (94815999).

Almost surely, 2^421404430 is an apocalyptic number.

421404430 is a deficient number, since it is larger than the sum of its proper divisors (337123562).

421404430 is a wasteful number, since it uses less digits than its factorization.

421404430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42140450.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 421404430 is about 20528.1375190250. The cubic root of 421404430 is about 749.7210399583.

Adding to 421404430 its reverse (34404124), we get a palindrome (455808554).

The spelling of 421404430 in words is "four hundred twenty-one million, four hundred four thousand, four hundred thirty".