It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 124 742 is not a prime number.
For example, 124 742 can be divided by 2: 124 742 / 2 = 62 371.
For 124 742 to be a prime number, it would have been required that 124 742 has only two divisors, i.e., itself and 1.
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124 742 is an even number, because it is evenly divisible by 2: 124 742 / 2 = 62 371.
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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 124 742 is about 353.188.
Thus, the square root of 124 742 is not an integer, and therefore 124 742 is not a square number.
The square of a number (here 124 742) is the result of the product of this number (124 742) by itself (i.e., 124 742 × 124 742); the square of 124 742 is sometimes called "raising 124 742 to the power 2", or "124 742 squared".
The square of 124 742 is 15 560 566 564 because 124 742 × 124 742 = 124 7422 = 15 560 566 564.
As a consequence, 124 742 is the square root of 15 560 566 564.
The multiples of 124 742 are all integers evenly divisible by 124 742, that is all numbers such that the remainder of the division by 124 742 is zero. There are infinitely many multiples of 124 742. The smallest multiples of 124 742 are: