142423643 has 2 divisors, whose sum is σ = 142423644. Its totient is φ = 142423642.

The previous prime is 142423621. The next prime is 142423661. The reversal of 142423643 is 346324241.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 142423643 - 2⁸ = 142423387 is a prime.

It is not a weakly prime, because it can be changed into another prime (142423343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71211821 + 71211822.

It is an arithmetic number, because the mean of its divisors is an integer number (71211822).

Almost surely, 2^142423643 is an apocalyptic number.

142423643 is a deficient number, since it is larger than the sum of its proper divisors (1).

142423643 is an equidigital number, since it uses as much as digits as its factorization.

142423643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 29.

The square root of 142423643 is about 11934.1377149755. The cubic root of 142423643 is about 522.2286533202.

Adding to 142423643 its reverse (346324241), we get a palindrome (488747884).

The spelling of 142423643 in words is "one hundred forty-two million, four hundred twenty-three thousand, six hundred forty-three".