It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 125 378 is not a prime number.
For example, 125 378 can be divided by 2: 125 378 / 2 = 62 689.
For 125 378 to be a prime number, it would have been required that 125 378 has only two divisors, i.e., itself and 1.
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125 378 is an even number, because it is evenly divisible by 2: 125 378 / 2 = 62 689.
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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 125 378 is about 354.088.
Thus, the square root of 125 378 is not an integer, and therefore 125 378 is not a square number.
The square of a number (here 125 378) is the result of the product of this number (125 378) by itself (i.e., 125 378 × 125 378); the square of 125 378 is sometimes called "raising 125 378 to the power 2", or "125 378 squared".
The square of 125 378 is 15 719 642 884 because 125 378 × 125 378 = 125 3782 = 15 719 642 884.
As a consequence, 125 378 is the square root of 15 719 642 884.
The multiples of 125 378 are all integers evenly divisible by 125 378, that is all numbers such that the remainder of the division by 125 378 is zero. There are infinitely many multiples of 125 378. The smallest multiples of 125 378 are: