142442647 has 2 divisors, whose sum is σ = 142442648. Its totient is φ = 142442646.

The previous prime is 142442633. The next prime is 142442681. The reversal of 142442647 is 746244241.

It is an a-pointer prime, because the next prime (142442681) can be obtained adding 142442647 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142442647 - 2²⁷ = 8224919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142442627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71221323 + 71221324.

It is an arithmetic number, because the mean of its divisors is an integer number (71221324).

Almost surely, 2^142442647 is an apocalyptic number.

142442647 is a deficient number, since it is larger than the sum of its proper divisors (1).

142442647 is an equidigital number, since it uses as much as digits as its factorization.

142442647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43008, while the sum is 34.

The square root of 142442647 is about 11934.9338917314. The cubic root of 142442647 is about 522.2518797821.

Adding to 142442647 its reverse (746244241), we get a palindrome (888686888).

The spelling of 142442647 in words is "one hundred forty-two million, four hundred forty-two thousand, six hundred forty-seven".