421003420 has 12 divisors (see below), whose sum is σ = 884107224. Its totient is φ = 168401360.

The previous prime is 421003391. The next prime is 421003421. The reversal of 421003420 is 24300124.

It is a junction number, because it is equal to n+sod(n) for n = 421003394 and 421003403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421003421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10525066 + ... + 10525105.

It is an arithmetic number, because the mean of its divisors is an integer number (73675602).

Almost surely, 2^421003420 is an apocalyptic number.

It is an amenable number.

421003420 is an abundant number, since it is smaller than the sum of its proper divisors (463103804).

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

421003420 is a wasteful number, since it uses less digits than its factorization.

421003420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21050180 (or 21050178 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 421003420 is about 20518.3678688145. The cubic root of 421003420 is about 749.4831520542.

Adding to 421003420 its reverse (24300124), we get a palindrome (445303544).

The spelling of 421003420 in words is "four hundred twenty-one million, three thousand, four hundred twenty".