142789 has 2 divisors, whose sum is σ = 142790. Its totient is φ = 142788.

The previous prime is 142787. The next prime is 142799. The reversal of 142789 is 987241.

142789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134689 + 8100 = 367^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 142789 - 2¹ = 142787 is a prime.

Together with 142787, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 142789.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71394 + 71395.

It is an arithmetic number, because the mean of its divisors is an integer number (71395).

2¹⁴²⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

142789 is a deficient number, since it is larger than the sum of its proper divisors (1).

142789 is an equidigital number, since it uses as much as digits as its factorization.

142789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 31.

The square root of 142789 is about 377.8743177301. The cubic root of 142789 is about 52.2674826840.

The spelling of 142789 in words is "one hundred forty-two thousand, seven hundred eighty-nine".