142001089 has 2 divisors, whose sum is σ = 142001090. Its totient is φ = 142001088.

The previous prime is 142001087. The next prime is 142001143. The reversal of 142001089 is 980100241.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127690000 + 14311089 = 11300^2 + 3783^2 .

It is an emirp because it is prime and its reverse (980100241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142001089 - 2¹ = 142001087 is a prime.

Together with 142001087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (142001087) 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, 71000544 + 71000545.

It is an arithmetic number, because the mean of its divisors is an integer number (71000545).

Almost surely, 2^142001089 is an apocalyptic number.

It is an amenable number.

142001089 is a deficient number, since it is larger than the sum of its proper divisors (1).

142001089 is an equidigital number, since it uses as much as digits as its factorization.

142001089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 142001089 is about 11916.4209811503. The cubic root of 142001089 is about 521.7116782922.

The spelling of 142001089 in words is "one hundred forty-two million, one thousand, eighty-nine".