It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 354 018 is not a prime number.
For example, 354 018 can be divided by 2: 354 018 / 2 = 177 009.
For 354 018 to be a prime number, it would have been required that 354 018 has only two divisors, i.e., itself and 1.
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354 018 is an even number, because it is evenly divisible by 2: 354 018 / 2 = 177 009.
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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 354 018 is about 594.994.
Thus, the square root of 354 018 is not an integer, and therefore 354 018 is not a square number.
The square of a number (here 354 018) is the result of the product of this number (354 018) by itself (i.e., 354 018 × 354 018); the square of 354 018 is sometimes called "raising 354 018 to the power 2", or "354 018 squared".
The square of 354 018 is 125 328 744 324 because 354 018 × 354 018 = 354 0182 = 125 328 744 324.
As a consequence, 354 018 is the square root of 125 328 744 324.
The multiples of 354 018 are all integers evenly divisible by 354 018, that is all numbers such that the remainder of the division by 354 018 is zero. There are infinitely many multiples of 354 018. The smallest multiples of 354 018 are: