138142 has 12 divisors (see below), whose sum is σ = 221040. Its totient is φ = 64736.

The previous prime is 138139. The next prime is 138143. The reversal of 138142 is 241831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 459 + ... + 697.

It is an arithmetic number, because the mean of its divisors is an integer number (18420).

2¹³⁸¹⁴² is an apocalyptic number.

138142 is a deficient number, since it is larger than the sum of its proper divisors (82898).

138142 is a wasteful number, since it uses less digits than its factorization.

138142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 258 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 138142 is about 371.6745888543. The cubic root of 138142 is about 51.6942112349.

Adding to 138142 its reverse (241831), we get a palindrome (379973).

The spelling of 138142 in words is "one hundred thirty-eight thousand, one hundred forty-two".