It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 408 is not a prime number.
For example, 120 408 can be divided by 2: 120 408 / 2 = 60 204.
For 120 408 to be a prime number, it would have been required that 120 408 has only two divisors, i.e., itself and 1.
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120 408 is an even number, because it is evenly divisible by 2: 120 408 / 2 = 60 204.
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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 120 408 is about 346.999.
Thus, the square root of 120 408 is not an integer, and therefore 120 408 is not a square number.
The square of a number (here 120 408) is the result of the product of this number (120 408) by itself (i.e., 120 408 × 120 408); the square of 120 408 is sometimes called "raising 120 408 to the power 2", or "120 408 squared".
The square of 120 408 is 14 498 086 464 because 120 408 × 120 408 = 120 4082 = 14 498 086 464.
As a consequence, 120 408 is the square root of 14 498 086 464.
The multiples of 120 408 are all integers evenly divisible by 120 408, that is all numbers such that the remainder of the division by 120 408 is zero. There are infinitely many multiples of 120 408. The smallest multiples of 120 408 are: