420001443 has 24 divisors (see below), whose sum is σ = 630110208. Its totient is φ = 279568584.

The previous prime is 420001411. The next prime is 420001453. The reversal of 420001443 is 344100024.

It is not a de Polignac number, because 420001443 - 2⁵ = 420001411 is a prime.

420001443 is a modest number, since divided by 1443 gives 420 as remainder.

It is not an unprimeable number, because it can be changed into a prime (420001453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 267246 + ... + 268812.

It is an arithmetic number, because the mean of its divisors is an integer number (26254592).

Almost surely, 2^420001443 is an apocalyptic number.

420001443 is a deficient number, since it is larger than the sum of its proper divisors (210108765).

420001443 is a wasteful number, since it uses less digits than its factorization.

420001443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2685 (or 2673 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 420001443 is about 20493.9367374841. The cubic root of 420001443 is about 748.8880963751. Note that the first 3 decimals are identical.

Adding to 420001443 its reverse (344100024), we get a palindrome (764101467).

The spelling of 420001443 in words is "four hundred twenty million, one thousand, four hundred forty-three".