It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 118 138 is not a prime number.
For example, 118 138 can be divided by 2: 118 138 / 2 = 59 069.
For 118 138 to be a prime number, it would have been required that 118 138 has only two divisors, i.e., itself and 1.
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118 138 is an even number, because it is evenly divisible by 2: 118 138 / 2 = 59 069.
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A number is a perfect square (or a square number) if its square root is an integer; that is to say, it is the product of an integer with itself. Here, the square root of 118 138 is about 343.712.
Thus, the square root of 118 138 is not an integer, and therefore 118 138 is not a square number.
The square of a number (here 118 138) is the result of the product of this number (118 138) by itself (i.e., 118 138 × 118 138); the square of 118 138 is sometimes called "raising 118 138 to the power 2", or "118 138 squared".
The square of 118 138 is 13 956 587 044 because 118 138 × 118 138 = 118 1382 = 13 956 587 044.
As a consequence, 118 138 is the square root of 13 956 587 044.
The multiples of 118 138 are all integers evenly divisible by 118 138, that is all numbers such that the remainder of the division by 118 138 is zero. There are infinitely many multiples of 118 138. The smallest multiples of 118 138 are: