138143 has 2 divisors, whose sum is σ = 138144. Its totient is φ = 138142.

The previous prime is 138139. The next prime is 138157. The reversal of 138143 is 341831.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 138143 - 2² = 138139 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138113) 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, 69071 + 69072.

It is an arithmetic number, because the mean of its divisors is an integer number (69072).

2¹³⁸¹⁴³ is an apocalyptic number.

138143 is a deficient number, since it is larger than the sum of its proper divisors (1).

138143 is an equidigital number, since it uses as much as digits as its factorization.

138143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

The square root of 138143 is about 371.6759341147. The cubic root of 138143 is about 51.6943359715.

Adding to 138143 its reverse (341831), we get a palindrome (479974).

The spelling of 138143 in words is "one hundred thirty-eight thousand, one hundred forty-three".