142242889 has 2 divisors, whose sum is σ = 142242890. Its totient is φ = 142242888.

The previous prime is 142242871. The next prime is 142242901. The reversal of 142242889 is 988242241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137663289 + 4579600 = 11733^2 + 2140^2 .

It is a cyclic number.

It is not a de Polignac number, because 142242889 - 2⁹ = 142242377 is a prime.

It is not a weakly prime, because it can be changed into another prime (142242829) 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, 71121444 + 71121445.

It is an arithmetic number, because the mean of its divisors is an integer number (71121445).

Almost surely, 2^142242889 is an apocalyptic number.

It is an amenable number.

142242889 is a deficient number, since it is larger than the sum of its proper divisors (1).

142242889 is an equidigital number, since it uses as much as digits as its factorization.

142242889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 40.

The square root of 142242889 is about 11926.5623295231. The cubic root of 142242889 is about 522.0076345874.

The spelling of 142242889 in words is "one hundred forty-two million, two hundred forty-two thousand, eight hundred eighty-nine".