142987589 has 2 divisors, whose sum is σ = 142987590. Its totient is φ = 142987588.

The previous prime is 142987567. The next prime is 142987609. The reversal of 142987589 is 985789241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105226564 + 37761025 = 10258^2 + 6145^2 .

It is a cyclic number.

It is not a de Polignac number, because 142987589 - 2⁸ = 142987333 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142987589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142987519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71493794 + 71493795.

It is an arithmetic number, because the mean of its divisors is an integer number (71493795).

Almost surely, 2^142987589 is an apocalyptic number.

It is an amenable number.

142987589 is a deficient number, since it is larger than the sum of its proper divisors (1).

142987589 is an equidigital number, since it uses as much as digits as its factorization.

142987589 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1451520, while the sum is 53.

The square root of 142987589 is about 11957.7418018621. The cubic root of 142987589 is about 522.9170242741.

The spelling of 142987589 in words is "one hundred forty-two million, nine hundred eighty-seven thousand, five hundred eighty-nine".