138265 has 4 divisors (see below), whose sum is σ = 165924. Its totient is φ = 110608.

The previous prime is 138251. The next prime is 138283. The reversal of 138265 is 562831.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17161 + 121104 = 131^2 + 348^2 .

It is a cyclic number.

It is not a de Polignac number, because 138265 - 2¹¹ = 136217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13822 + ... + 13831.

It is an arithmetic number, because the mean of its divisors is an integer number (41481).

2¹³⁸²⁶⁵ is an apocalyptic number.

It is an amenable number.

138265 is a deficient number, since it is larger than the sum of its proper divisors (27659).

138265 is an equidigital number, since it uses as much as digits as its factorization.

138265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27658.

The product of its digits is 1440, while the sum is 25.

The square root of 138265 is about 371.8400193632. The cubic root of 138265 is about 51.7095493212.

It can be divided in two parts, 13826 and 5, that added together give a palindrome (13831).

The spelling of 138265 in words is "one hundred thirty-eight thousand, two hundred sixty-five".