421330312 has 64 divisors (see below), whose sum is σ = 906837120. Its totient is φ = 181797888.

The previous prime is 421330291. The next prime is 421330319. The reversal of 421330312 is 213033124.

It is a self number, because there is not a number n which added to its sum of digits gives 421330312.

It is not an unprimeable number, because it can be changed into a prime (421330319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 294543 + ... + 295969.

It is an arithmetic number, because the mean of its divisors is an integer number (14169330).

Almost surely, 2^421330312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421330312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (453418560).

421330312 is an abundant number, since it is smaller than the sum of its proper divisors (485506808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421330312 is a wasteful number, since it uses less digits than its factorization.

421330312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1630 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 421330312 is about 20526.3321613970. The cubic root of 421330312 is about 749.6770829120.

Adding to 421330312 its reverse (213033124), we get a palindrome (634363436).

The spelling of 421330312 in words is "four hundred twenty-one million, three hundred thirty thousand, three hundred twelve".