138147 has 4 divisors (see below), whose sum is σ = 184200. Its totient is φ = 92096.

The previous prime is 138143. The next prime is 138157. The reversal of 138147 is 741831.

138147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138147 - 2² = 138143 is a prime.

It is a D-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 3 ways as a sum of consecutive naturals, for example, 23022 + ... + 23027.

It is an arithmetic number, because the mean of its divisors is an integer number (46050).

2¹³⁸¹⁴⁷ is an apocalyptic number.

138147 is a deficient number, since it is larger than the sum of its proper divisors (46053).

138147 is an equidigital number, since it uses as much as digits as its factorization.

138147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46052.

The product of its digits is 672, while the sum is 24.

The square root of 138147 is about 371.6813151074. The cubic root of 138147 is about 51.6948349118.

Adding to 138147 its reverse (741831), we get a palindrome (879978).

The spelling of 138147 in words is "one hundred thirty-eight thousand, one hundred forty-seven".