421333420 has 24 divisors (see below), whose sum is σ = 885188304. Its totient is φ = 168459456.

The previous prime is 421333399. The next prime is 421333441. The reversal of 421333420 is 24333124.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (421333399) and next prime (421333441).

It is a junction number, because it is equal to n+sod(n) for n = 421333391 and 421333400.

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 7 ways as a sum of consecutive naturals, for example, 79287 + ... + 84433.

It is an arithmetic number, because the mean of its divisors is an integer number (36882846).

Almost surely, 2^421333420 is an apocalyptic number.

It is an amenable number.

421333420 is an abundant number, since it is smaller than the sum of its proper divisors (463854884).

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

421333420 is a wasteful number, since it uses less digits than its factorization.

421333420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9249 (or 9247 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 421333420 is about 20526.4078688893. The cubic root of 421333420 is about 749.6789262722.

Adding to 421333420 its reverse (24333124), we get a palindrome (445666544).

The spelling of 421333420 in words is "four hundred twenty-one million, three hundred thirty-three thousand, four hundred twenty".