It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 125 988 is not a prime number.
For example, 125 988 can be divided by 2: 125 988 / 2 = 62 994.
For 125 988 to be a prime number, it would have been required that 125 988 has only two divisors, i.e., itself and 1.
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125 988 is an even number, because it is evenly divisible by 2: 125 988 / 2 = 62 994.
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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 125 988 is about 354.948.
Thus, the square root of 125 988 is not an integer, and therefore 125 988 is not a square number.
The square of a number (here 125 988) is the result of the product of this number (125 988) by itself (i.e., 125 988 × 125 988); the square of 125 988 is sometimes called "raising 125 988 to the power 2", or "125 988 squared".
The square of 125 988 is 15 872 976 144 because 125 988 × 125 988 = 125 9882 = 15 872 976 144.
As a consequence, 125 988 is the square root of 15 872 976 144.
The multiples of 125 988 are all integers evenly divisible by 125 988, that is all numbers such that the remainder of the division by 125 988 is zero. There are infinitely many multiples of 125 988. The smallest multiples of 125 988 are: