420042443 has 16 divisors (see below), whose sum is σ = 470927520. Its totient is φ = 372312576.

The previous prime is 420042421. The next prime is 420042449. The reversal of 420042443 is 344240024.

It is a cyclic number.

It is not a de Polignac number, because 420042443 - 2⁶ = 420042379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420042449) 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, 52121 + ... + 59637.

It is an arithmetic number, because the mean of its divisors is an integer number (29432970).

Almost surely, 2^420042443 is an apocalyptic number.

420042443 is a deficient number, since it is larger than the sum of its proper divisors (50885077).

420042443 is a wasteful number, since it uses less digits than its factorization.

420042443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7726.

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 420042443 is about 20494.9370089298. The cubic root of 420042443 is about 748.9124640794.

Adding to 420042443 its reverse (344240024), we get a palindrome (764282467).

The spelling of 420042443 in words is "four hundred twenty million, forty-two thousand, four hundred forty-three".