420867143 has 2 divisors, whose sum is σ = 420867144. Its totient is φ = 420867142.

The previous prime is 420867131. The next prime is 420867199. The reversal of 420867143 is 341768024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420867143 - 2¹⁸ = 420604999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420867103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210433571 + 210433572.

It is an arithmetic number, because the mean of its divisors is an integer number (210433572).

Almost surely, 2^420867143 is an apocalyptic number.

420867143 is a deficient number, since it is larger than the sum of its proper divisors (1).

420867143 is an equidigital number, since it uses as much as digits as its factorization.

420867143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 420867143 is about 20515.0467462299. The cubic root of 420867143 is about 749.4022751673.

The spelling of 420867143 in words is "four hundred twenty million, eight hundred sixty-seven thousand, one hundred forty-three".