It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 249 is not a prime number.
For example, 120 249 can be divided by 3: 120 249 / 3 = 40 083.
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For 120 249 to be a prime number, it would have been required that 120 249 has only two divisors, i.e., itself and 1.
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120 249 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 120 249 is about 346.769.
Thus, the square root of 120 249 is not an integer, and therefore 120 249 is not a square number.
The square of a number (here 120 249) is the result of the product of this number (120 249) by itself (i.e., 120 249 × 120 249); the square of 120 249 is sometimes called "raising 120 249 to the power 2", or "120 249 squared".
The square of 120 249 is 14 459 822 001 because 120 249 × 120 249 = 120 2492 = 14 459 822 001.
As a consequence, 120 249 is the square root of 14 459 822 001.
The multiples of 120 249 are all integers evenly divisible by 120 249, that is all numbers such that the remainder of the division by 120 249 is zero. There are infinitely many multiples of 120 249. The smallest multiples of 120 249 are: