It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 388 is not a prime number.
For example, 120 388 can be divided by 2: 120 388 / 2 = 60 194.
For 120 388 to be a prime number, it would have been required that 120 388 has only two divisors, i.e., itself and 1.
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120 388 is an even number, because it is evenly divisible by 2: 120 388 / 2 = 60 194.
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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 120 388 is about 346.970.
Thus, the square root of 120 388 is not an integer, and therefore 120 388 is not a square number.
The square of a number (here 120 388) is the result of the product of this number (120 388) by itself (i.e., 120 388 × 120 388); the square of 120 388 is sometimes called "raising 120 388 to the power 2", or "120 388 squared".
The square of 120 388 is 14 493 270 544 because 120 388 × 120 388 = 120 3882 = 14 493 270 544.
As a consequence, 120 388 is the square root of 14 493 270 544.
The multiples of 120 388 are all integers evenly divisible by 120 388, that is all numbers such that the remainder of the division by 120 388 is zero. There are infinitely many multiples of 120 388. The smallest multiples of 120 388 are: