142442687 has 2 divisors, whose sum is σ = 142442688. Its totient is φ = 142442686.

The previous prime is 142442683. The next prime is 142442731. The reversal of 142442687 is 786244241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142442687 - 2² = 142442683 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142442687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142442681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71221343 + 71221344.

It is an arithmetic number, because the mean of its divisors is an integer number (71221344).

Almost surely, 2^142442687 is an apocalyptic number.

142442687 is a deficient number, since it is larger than the sum of its proper divisors (1).

142442687 is an equidigital number, since it uses as much as digits as its factorization.

142442687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86016, while the sum is 38.

The square root of 142442687 is about 11934.9355674842. The cubic root of 142442687 is about 522.2519286674.

The spelling of 142442687 in words is "one hundred forty-two million, four hundred forty-two thousand, six hundred eighty-seven".