It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 125 942 is not a prime number.
For example, 125 942 can be divided by 2: 125 942 / 2 = 62 971.
For 125 942 to be a prime number, it would have been required that 125 942 has only two divisors, i.e., itself and 1.
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125 942 is an even number, because it is evenly divisible by 2: 125 942 / 2 = 62 971.
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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 125 942 is about 354.883.
Thus, the square root of 125 942 is not an integer, and therefore 125 942 is not a square number.
The square of a number (here 125 942) is the result of the product of this number (125 942) by itself (i.e., 125 942 × 125 942); the square of 125 942 is sometimes called "raising 125 942 to the power 2", or "125 942 squared".
The square of 125 942 is 15 861 387 364 because 125 942 × 125 942 = 125 9422 = 15 861 387 364.
As a consequence, 125 942 is the square root of 15 861 387 364.
The multiples of 125 942 are all integers evenly divisible by 125 942, that is all numbers such that the remainder of the division by 125 942 is zero. There are infinitely many multiples of 125 942. The smallest multiples of 125 942 are: