It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 40 743 is not a prime number.
For example, 40 743 can be divided by 3: 40 743 / 3 = 13 581.
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For 40 743 to be a prime number, it would have been required that 40 743 has only two divisors, i.e., itself and 1.
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40 743 is an odd number, because it is not evenly divisible by 2.
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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 40 743 is about 201.849.
Thus, the square root of 40 743 is not an integer, and therefore 40 743 is not a square number.
The square of a number (here 40 743) is the result of the product of this number (40 743) by itself (i.e., 40 743 × 40 743); the square of 40 743 is sometimes called "raising 40 743 to the power 2", or "40 743 squared".
The square of 40 743 is 1 659 992 049 because 40 743 × 40 743 = 40 7432 = 1 659 992 049.
As a consequence, 40 743 is the square root of 1 659 992 049.
The multiples of 40 743 are all integers evenly divisible by 40 743, that is all numbers such that the remainder of the division by 40 743 is zero. There are infinitely many multiples of 40 743. The smallest multiples of 40 743 are: