138002 has 4 divisors (see below), whose sum is σ = 207006. Its totient is φ = 69000.

The previous prime is 137999. The next prime is 138007. The reversal of 138002 is 200831.

138002 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200831 = 47 ⋅4273.

It can be written as a sum of positive squares in only one way, i.e., 137641 + 361 = 371^2 + 19^2 .

It is not an unprimeable number, because it can be changed into a prime (138007) by changing a digit.

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 as a sum of consecutive naturals, namely, 34499 + ... + 34502.

2¹³⁸⁰⁰² is an apocalyptic number.

138002 is a deficient number, since it is larger than the sum of its proper divisors (69004).

138002 is an equidigital number, since it uses as much as digits as its factorization.

138002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69003.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 138002 is about 371.4862043199. The cubic root of 138002 is about 51.6767421673.

Adding to 138002 its reverse (200831), we get a palindrome (338833).

The spelling of 138002 in words is "one hundred thirty-eight thousand, two".