420142043 has 2 divisors, whose sum is σ = 420142044. Its totient is φ = 420142042.

The previous prime is 420142013. The next prime is 420142069. The reversal of 420142043 is 340241024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420142043 - 2⁶ = 420141979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420142013) 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 as a sum of consecutive naturals, namely, 210071021 + 210071022.

It is an arithmetic number, because the mean of its divisors is an integer number (210071022).

Almost surely, 2^420142043 is an apocalyptic number.

420142043 is a deficient number, since it is larger than the sum of its proper divisors (1).

420142043 is an equidigital number, since it uses as much as digits as its factorization.

420142043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 420142043 is about 20497.3667333148. The cubic root of 420142043 is about 748.9716531667.

Adding to 420142043 its reverse (340241024), we get a palindrome (760383067).

The spelling of 420142043 in words is "four hundred twenty million, one hundred forty-two thousand, forty-three".