It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 135 018 is not a prime number.
For example, 135 018 can be divided by 2: 135 018 / 2 = 67 509.
For 135 018 to be a prime number, it would have been required that 135 018 has only two divisors, i.e., itself and 1.
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135 018 is an even number, because it is evenly divisible by 2: 135 018 / 2 = 67 509.
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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 135 018 is about 367.448.
Thus, the square root of 135 018 is not an integer, and therefore 135 018 is not a square number.
The square of a number (here 135 018) is the result of the product of this number (135 018) by itself (i.e., 135 018 × 135 018); the square of 135 018 is sometimes called "raising 135 018 to the power 2", or "135 018 squared".
The square of 135 018 is 18 229 860 324 because 135 018 × 135 018 = 135 0182 = 18 229 860 324.
As a consequence, 135 018 is the square root of 18 229 860 324.
The multiples of 135 018 are all integers evenly divisible by 135 018, that is all numbers such that the remainder of the division by 135 018 is zero. There are infinitely many multiples of 135 018. The smallest multiples of 135 018 are: