142085987 has 2 divisors, whose sum is σ = 142085988. Its totient is φ = 142085986.

The previous prime is 142085947. The next prime is 142086041. The reversal of 142085987 is 789580241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 142085987 - 2⁸ = 142085731 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (142085917) 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, 71042993 + 71042994.

It is an arithmetic number, because the mean of its divisors is an integer number (71042994).

Almost surely, 2^142085987 is an apocalyptic number.

142085987 is a deficient number, since it is larger than the sum of its proper divisors (1).

142085987 is an equidigital number, since it uses as much as digits as its factorization.

142085987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 44.

The square root of 142085987 is about 11919.9826761619. The cubic root of 142085987 is about 521.8156292650.

The spelling of 142085987 in words is "one hundred forty-two million, eighty-five thousand, nine hundred eighty-seven".