142189 has 2 divisors, whose sum is σ = 142190. Its totient is φ = 142188.

The previous prime is 142183. The next prime is 142193. The reversal of 142189 is 981241.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75625 + 66564 = 275^2 + 258^2 .

It is an emirp because it is prime and its reverse (981241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142189 - 2⁵ = 142157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71094 + 71095.

It is an arithmetic number, because the mean of its divisors is an integer number (71095).

2¹⁴²¹⁸⁹ is an apocalyptic number.

It is an amenable number.

142189 is a deficient number, since it is larger than the sum of its proper divisors (1).

142189 is an equidigital number, since it uses as much as digits as its factorization.

142189 is an evil number, because the sum of its binary digits is even.

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

The square root of 142189 is about 377.0795672003. The cubic root of 142189 is about 52.1941705052.

The spelling of 142189 in words is "one hundred forty-two thousand, one hundred eighty-nine".