138135 has 8 divisors (see below), whose sum is σ = 221040. Its totient is φ = 73664.

The previous prime is 138113. The next prime is 138139. The reversal of 138135 is 531831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138135 - 2⁶ = 138071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4590 + ... + 4619.

It is an arithmetic number, because the mean of its divisors is an integer number (27630).

2¹³⁸¹³⁵ is an apocalyptic number.

138135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138135 is a deficient number, since it is larger than the sum of its proper divisors (82905).

138135 is an equidigital number, since it uses as much as digits as its factorization.

138135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9217.

The product of its digits is 360, while the sum is 21.

The square root of 138135 is about 371.6651718953. The cubic root of 138135 is about 51.6933380619.

Adding to 138135 its reverse (531831), we get a palindrome (669966).

The spelling of 138135 in words is "one hundred thirty-eight thousand, one hundred thirty-five".