138122 has 4 divisors (see below), whose sum is σ = 207186. Its totient is φ = 69060.

The previous prime is 138113. The next prime is 138139. The reversal of 138122 is 221831.

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

It can be written as a sum of positive squares in only one way, i.e., 109561 + 28561 = 331^2 + 169^2 .

It is a plaindrome in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 138122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34529 + ... + 34532.

2¹³⁸¹²² is an apocalyptic number.

138122 is a deficient number, since it is larger than the sum of its proper divisors (69064).

138122 is an equidigital number, since it uses as much as digits as its factorization.

138122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69063.

The product of its digits is 96, while the sum is 17.

The square root of 138122 is about 371.6476826243. The cubic root of 138122 is about 51.6917163766.

Adding to 138122 its reverse (221831), we get a palindrome (359953).

It can be divided in two parts, 138 and 122, that multiplied together give a triangular number (16836 = T₁₈₃).

The spelling of 138122 in words is "one hundred thirty-eight thousand, one hundred twenty-two".