420321143 has 4 divisors (see below), whose sum is σ = 458532168. Its totient is φ = 382110120.

The previous prime is 420321137. The next prime is 420321151. The reversal of 420321143 is 341123024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420321143 - 2¹⁶ = 420255607 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 (420321163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19105496 + ... + 19105517.

It is an arithmetic number, because the mean of its divisors is an integer number (114633042).

Almost surely, 2^420321143 is an apocalyptic number.

420321143 is a deficient number, since it is larger than the sum of its proper divisors (38211025).

420321143 is a wasteful number, since it uses less digits than its factorization.

420321143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38211024.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 420321143 is about 20501.7351216915. The cubic root of 420321143 is about 749.0780630258.

Adding to 420321143 its reverse (341123024), we get a palindrome (761444167).

The spelling of 420321143 in words is "four hundred twenty million, three hundred twenty-one thousand, one hundred forty-three".