421234220 has 48 divisors (see below), whose sum is σ = 966470400. Its totient is φ = 152944320.

The previous prime is 421234207. The next prime is 421234243. The reversal of 421234220 is 22432124.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 421234192 and 421234201.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 223241 + ... + 225119.

It is an arithmetic number, because the mean of its divisors is an integer number (20134800).

Almost surely, 2^421234220 is an apocalyptic number.

It is an amenable number.

421234220 is an abundant number, since it is smaller than the sum of its proper divisors (545236180).

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

421234220 is a wasteful number, since it uses less digits than its factorization.

421234220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918 (or 2916 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 421234220 is about 20523.9913272248. The cubic root of 421234220 is about 749.6200861049.

Adding to 421234220 its reverse (22432124), we get a palindrome (443666344).

The spelling of 421234220 in words is "four hundred twenty-one million, two hundred thirty-four thousand, two hundred twenty".