Adding to 138140 its reverse (41831), we get a palindrome (179971).
It is a happy number.
138140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138140.
2138140 is an apocalyptic number.
138140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
138140 is a wasteful number, since it uses less digits than its factorization.
138140 is an odious number, because the sum of its binary digits is odd.
The square root of 138140 is about 371.6718983189. The cubic root of 138140 is about 51.6939617599.
The spelling of 138140 in words is "one hundred thirty-eight thousand, one hundred forty".