420541220 has 48 divisors (see below), whose sum is σ = 981626688. Its totient is φ = 150034560.

The previous prime is 420541211. The next prime is 420541241. The reversal of 420541220 is 22145024.

It is a happy number.

420541220 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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 420541192 and 420541201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6374 + ... + 29693.

It is an arithmetic number, because the mean of its divisors is an integer number (20450556).

Almost surely, 2^420541220 is an apocalyptic number.

It is an amenable number.

420541220 is an abundant number, since it is smaller than the sum of its proper divisors (561085468).

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

420541220 is a wasteful number, since it uses less digits than its factorization.

420541220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36140 (or 36138 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 420541220 is about 20507.1016967294. The cubic root of 420541220 is about 749.2087774345.

Adding to 420541220 its reverse (22145024), we get a palindrome (442686244).

The spelling of 420541220 in words is "four hundred twenty million, five hundred forty-one thousand, two hundred twenty".