142000861 has 2 divisors, whose sum is σ = 142000862. Its totient is φ = 142000860.

The previous prime is 142000843. The next prime is 142000883. The reversal of 142000861 is 168000241.

It is an a-pointer prime, because the next prime (142000883) can be obtained adding 142000861 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127825636 + 14175225 = 11306^2 + 3765^2 .

It is an emirp because it is prime and its reverse (168000241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142000861 - 2⁵ = 142000829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142000811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71000430 + 71000431.

It is an arithmetic number, because the mean of its divisors is an integer number (71000431).

Almost surely, 2^142000861 is an apocalyptic number.

It is an amenable number.

142000861 is a deficient number, since it is larger than the sum of its proper divisors (1).

142000861 is an equidigital number, since it uses as much as digits as its factorization.

142000861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 142000861 is about 11916.4114145157. The cubic root of 142000861 is about 521.7113990682.

The spelling of 142000861 in words is "one hundred forty-two million, eight hundred sixty-one", and thus it is an aban number.