420100420 has 24 divisors (see below), whose sum is σ = 885576384. Its totient is φ = 167399136.

The previous prime is 420100403. The next prime is 420100423. The reversal of 420100420 is 24001024.

It is a self number, because there is not a number n which added to its sum of digits gives 420100420.

It is not an unprimeable number, because it can be changed into a prime (420100423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34674 + ... + 45193.

It is an arithmetic number, because the mean of its divisors is an integer number (36899016).

Almost surely, 2^420100420 is an apocalyptic number.

It is an amenable number.

420100420 is an abundant number, since it is smaller than the sum of its proper divisors (465475964).

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

420100420 is a wasteful number, since it uses less digits than its factorization.

420100420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80139 (or 80137 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 420100420 is about 20496.3513826242. The cubic root of 420100420 is about 748.9469190899.

Adding to 420100420 its reverse (24001024), we get a palindrome (444101444).

It can be divided in two parts, 4201004 and 20, that added together give a palindrome (4201024).

The spelling of 420100420 in words is "four hundred twenty million, one hundred thousand, four hundred twenty".