420541540 has 12 divisors (see below), whose sum is σ = 883137276. Its totient is φ = 168216608.

The previous prime is 420541523. The next prime is 420541543. The reversal of 420541540 is 45145024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 234273636 + 186267904 = 15306^2 + 13648^2 .

It is not an unprimeable number, because it can be changed into a prime (420541543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10513519 + ... + 10513558.

It is an arithmetic number, because the mean of its divisors is an integer number (73594773).

Almost surely, 2^420541540 is an apocalyptic number.

It is an amenable number.

420541540 is an abundant number, since it is smaller than the sum of its proper divisors (462595736).

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

420541540 is a wasteful number, since it uses less digits than its factorization.

420541540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21027086 (or 21027084 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 420541540 is about 20507.1094989031. The cubic root of 420541540 is about 749.2089674648.

Adding to 420541540 its reverse (45145024), we get a palindrome (465686564).

The spelling of 420541540 in words is "four hundred twenty million, five hundred forty-one thousand, five hundred forty".