420221140 has 24 divisors (see below), whose sum is σ = 884749320. Its totient is φ = 167653248.

The previous prime is 420221129. The next prime is 420221141. The reversal of 420221140 is 41122024.

It can be written as a sum of positive squares in 4 ways, for example, as 1527696 + 418693444 = 1236^2 + 20462^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420221141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19227 + ... + 34786.

It is an arithmetic number, because the mean of its divisors is an integer number (36864555).

Almost surely, 2^420221140 is an apocalyptic number.

It is an amenable number.

420221140 is an abundant number, since it is smaller than the sum of its proper divisors (464528180).

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

420221140 is a wasteful number, since it uses less digits than its factorization.

420221140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54411 (or 54409 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 420221140 is about 20499.2960854757. The cubic root of 420221140 is about 749.0186513145.

Adding to 420221140 its reverse (41122024), we get a palindrome (461343164).

The spelling of 420221140 in words is "four hundred twenty million, two hundred twenty-one thousand, one hundred forty".