It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 989 is not a prime number.
For example, 120 989 can be divided by 11: 120 989 / 11 = 10 999.
For 120 989 to be a prime number, it would have been required that 120 989 has only two divisors, i.e., itself and 1.
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120 989 is an odd number, because it is not evenly divisible by 2.
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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 120 989 is about 347.835.
Thus, the square root of 120 989 is not an integer, and therefore 120 989 is not a square number.
The square of a number (here 120 989) is the result of the product of this number (120 989) by itself (i.e., 120 989 × 120 989); the square of 120 989 is sometimes called "raising 120 989 to the power 2", or "120 989 squared".
The square of 120 989 is 14 638 338 121 because 120 989 × 120 989 = 120 9892 = 14 638 338 121.
As a consequence, 120 989 is the square root of 14 638 338 121.
The multiples of 120 989 are all integers evenly divisible by 120 989, that is all numbers such that the remainder of the division by 120 989 is zero. There are infinitely many multiples of 120 989. The smallest multiples of 120 989 are: