420221125 has 16 divisors (see below), whose sum is σ = 535601664. Its totient is φ = 329019600.

The previous prime is 420221117. The next prime is 420221129. The reversal of 420221125 is 521122024.

It is not a de Polignac number, because 420221125 - 2³ = 420221117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420221129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29889 + ... + 41638.

It is an arithmetic number, because the mean of its divisors is an integer number (33475104).

Almost surely, 2^420221125 is an apocalyptic number.

It is an amenable number.

420221125 is a deficient number, since it is larger than the sum of its proper divisors (115380539).

420221125 is an equidigital number, since it uses as much as digits as its factorization.

420221125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71589 (or 71579 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 420221125 is about 20499.2957196095. The cubic root of 420221125 is about 749.0186424023.

Adding to 420221125 its reverse (521122024), we get a palindrome (941343149).

The spelling of 420221125 in words is "four hundred twenty million, two hundred twenty-one thousand, one hundred twenty-five".