142890871 has 2 divisors, whose sum is σ = 142890872. Its totient is φ = 142890870.

The previous prime is 142890841. The next prime is 142890877. The reversal of 142890871 is 178098241.

It is a happy number.

142890871 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (178098241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142890871 - 2¹⁹ = 142366583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142890877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71445435 + 71445436.

It is an arithmetic number, because the mean of its divisors is an integer number (71445436).

Almost surely, 2^142890871 is an apocalyptic number.

142890871 is a deficient number, since it is larger than the sum of its proper divisors (1).

142890871 is an equidigital number, since it uses as much as digits as its factorization.

142890871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 142890871 is about 11953.6969595184. The cubic root of 142890871 is about 522.7990958660.

The spelling of 142890871 in words is "one hundred forty-two million, eight hundred ninety thousand, eight hundred seventy-one".