423242143 has 2 divisors, whose sum is σ = 423242144. Its totient is φ = 423242142.

The previous prime is 423242129. The next prime is 423242177. The reversal of 423242143 is 341242324.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423242143 - 2²¹ = 421144991 is a prime.

It is a super-2 number, since 2×423242143² = 358267823222464898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423242243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211621071 + 211621072.

It is an arithmetic number, because the mean of its divisors is an integer number (211621072).

Almost surely, 2^423242143 is an apocalyptic number.

423242143 is a deficient number, since it is larger than the sum of its proper divisors (1).

423242143 is an equidigital number, since it uses as much as digits as its factorization.

423242143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 25.

The square root of 423242143 is about 20572.8496567685. The cubic root of 423242143 is about 750.8092852439.

Adding to 423242143 its reverse (341242324), we get a palindrome (764484467).

The spelling of 423242143 in words is "four hundred twenty-three million, two hundred forty-two thousand, one hundred forty-three".