421304421 has 8 divisors (see below), whose sum is σ = 594782784. Its totient is φ = 264347840.

The previous prime is 421304357. The next prime is 421304437. The reversal of 421304421 is 124403124.

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

It is a cyclic number.

It is not a de Polignac number, because 421304421 - 2⁶ = 421304357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421304021) 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 7 ways as a sum of consecutive naturals, for example, 4130385 + ... + 4130486.

It is an arithmetic number, because the mean of its divisors is an integer number (74347848).

Almost surely, 2^421304421 is an apocalyptic number.

It is an amenable number.

421304421 is a deficient number, since it is larger than the sum of its proper divisors (173478363).

421304421 is a wasteful number, since it uses less digits than its factorization.

421304421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260891.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 421304421 is about 20525.7014740057. The cubic root of 421304421 is about 749.6617265622.

Adding to 421304421 its reverse (124403124), we get a palindrome (545707545).

The spelling of 421304421 in words is "four hundred twenty-one million, three hundred four thousand, four hundred twenty-one".