It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 243 is not a prime number.
For example, 120 243 can be divided by 3: 120 243 / 3 = 40 081.
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For 120 243 to be a prime number, it would have been required that 120 243 has only two divisors, i.e., itself and 1.
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120 243 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 120 243 is about 346.761.
Thus, the square root of 120 243 is not an integer, and therefore 120 243 is not a square number.
The square of a number (here 120 243) is the result of the product of this number (120 243) by itself (i.e., 120 243 × 120 243); the square of 120 243 is sometimes called "raising 120 243 to the power 2", or "120 243 squared".
The square of 120 243 is 14 458 379 049 because 120 243 × 120 243 = 120 2432 = 14 458 379 049.
As a consequence, 120 243 is the square root of 14 458 379 049.
The multiples of 120 243 are all integers evenly divisible by 120 243, that is all numbers such that the remainder of the division by 120 243 is zero. There are infinitely many multiples of 120 243. The smallest multiples of 120 243 are: