It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 126 502 is not a prime number.
For example, 126 502 can be divided by 2: 126 502 / 2 = 63 251.
For 126 502 to be a prime number, it would have been required that 126 502 has only two divisors, i.e., itself and 1.
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126 502 is an even number, because it is evenly divisible by 2: 126 502 / 2 = 63 251.
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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 126 502 is about 355.671.
Thus, the square root of 126 502 is not an integer, and therefore 126 502 is not a square number.
The square of a number (here 126 502) is the result of the product of this number (126 502) by itself (i.e., 126 502 × 126 502); the square of 126 502 is sometimes called "raising 126 502 to the power 2", or "126 502 squared".
The square of 126 502 is 16 002 756 004 because 126 502 × 126 502 = 126 5022 = 16 002 756 004.
As a consequence, 126 502 is the square root of 16 002 756 004.
The multiples of 126 502 are all integers evenly divisible by 126 502, that is all numbers such that the remainder of the division by 126 502 is zero. There are infinitely many multiples of 126 502. The smallest multiples of 126 502 are: