It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 120 456 is not a prime number.
For example, 120 456 can be divided by 2: 120 456 / 2 = 60 228.
For 120 456 to be a prime number, it would have been required that 120 456 has only two divisors, i.e., itself and 1.
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120 456 is an even number, because it is evenly divisible by 2: 120 456 / 2 = 60 228.
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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 120 456 is about 347.068.
Thus, the square root of 120 456 is not an integer, and therefore 120 456 is not a square number.
The square of a number (here 120 456) is the result of the product of this number (120 456) by itself (i.e., 120 456 × 120 456); the square of 120 456 is sometimes called "raising 120 456 to the power 2", or "120 456 squared".
The square of 120 456 is 14 509 647 936 because 120 456 × 120 456 = 120 4562 = 14 509 647 936.
As a consequence, 120 456 is the square root of 14 509 647 936.
The multiples of 120 456 are all integers evenly divisible by 120 456, that is all numbers such that the remainder of the division by 120 456 is zero. There are infinitely many multiples of 120 456. The smallest multiples of 120 456 are: