420305100 has 36 divisors (see below), whose sum is σ = 1216083624. Its totient is φ = 112081280.

The previous prime is 420305087. The next prime is 420305101. The reversal of 420305100 is 1503024.

420305100 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 420305100.

It is not an unprimeable number, because it can be changed into a prime (420305101) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 700209 + ... + 700808.

Almost surely, 2^420305100 is an apocalyptic number.

It is an amenable number.

420305100 is an abundant number, since it is smaller than the sum of its proper divisors (795778524).

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

420305100 is a wasteful number, since it uses less digits than its factorization.

420305100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401034 (or 1401027 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 420305100 is about 20501.3438583913. The cubic root of 420305100 is about 749.0685325256.

Adding to 420305100 its reverse (1503024), we get a palindrome (421808124).

The spelling of 420305100 in words is "four hundred twenty million, three hundred five thousand, one hundred".