It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 509 is not a prime number.
For example, 120 509 can be divided by 37: 120 509 / 37 = 3 257.
For 120 509 to be a prime number, it would have been required that 120 509 has only two divisors, i.e., itself and 1.
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120 509 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 120 509 is about 347.144.
Thus, the square root of 120 509 is not an integer, and therefore 120 509 is not a square number.
The square of a number (here 120 509) is the result of the product of this number (120 509) by itself (i.e., 120 509 × 120 509); the square of 120 509 is sometimes called "raising 120 509 to the power 2", or "120 509 squared".
The square of 120 509 is 14 522 419 081 because 120 509 × 120 509 = 120 5092 = 14 522 419 081.
As a consequence, 120 509 is the square root of 14 522 419 081.
The multiples of 120 509 are all integers evenly divisible by 120 509, that is all numbers such that the remainder of the division by 120 509 is zero. There are infinitely many multiples of 120 509. The smallest multiples of 120 509 are: