It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 127 742 is not a prime number.
For example, 127 742 can be divided by 2: 127 742 / 2 = 63 871.
For 127 742 to be a prime number, it would have been required that 127 742 has only two divisors, i.e., itself and 1.
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127 742 is an even number, because it is evenly divisible by 2: 127 742 / 2 = 63 871.
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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 127 742 is about 357.410.
Thus, the square root of 127 742 is not an integer, and therefore 127 742 is not a square number.
The square of a number (here 127 742) is the result of the product of this number (127 742) by itself (i.e., 127 742 × 127 742); the square of 127 742 is sometimes called "raising 127 742 to the power 2", or "127 742 squared".
The square of 127 742 is 16 318 018 564 because 127 742 × 127 742 = 127 7422 = 16 318 018 564.
As a consequence, 127 742 is the square root of 16 318 018 564.
The multiples of 127 742 are all integers evenly divisible by 127 742, that is all numbers such that the remainder of the division by 127 742 is zero. There are infinitely many multiples of 127 742. The smallest multiples of 127 742 are: