421421330 has 128 divisors (see below), whose sum is σ = 956448000. Its totient is φ = 131604480.

The previous prime is 421421309. The next prime is 421421333. The reversal of 421421330 is 33124124.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421421333) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1030166 + ... + 1030574.

It is an arithmetic number, because the mean of its divisors is an integer number (7472250).

Almost surely, 2^421421330 is an apocalyptic number.

421421330 is an abundant number, since it is smaller than the sum of its proper divisors (535026670).

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

421421330 is a wasteful number, since it uses less digits than its factorization.

421421330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 421421330 is about 20528.5491450321. The cubic root of 421421330 is about 749.7310620932.

Adding to 421421330 its reverse (33124124), we get a palindrome (454545454).

The spelling of 421421330 in words is "four hundred twenty-one million, four hundred twenty-one thousand, three hundred thirty".