It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 40 712 is not a prime number.
For example, 40 712 can be divided by 2: 40 712 / 2 = 20 356.
For 40 712 to be a prime number, it would have been required that 40 712 has only two divisors, i.e., itself and 1.
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40 712 is an even number, because it is evenly divisible by 2: 40 712 / 2 = 20 356.
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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 40 712 is about 201.772.
Thus, the square root of 40 712 is not an integer, and therefore 40 712 is not a square number.
The square of a number (here 40 712) is the result of the product of this number (40 712) by itself (i.e., 40 712 × 40 712); the square of 40 712 is sometimes called "raising 40 712 to the power 2", or "40 712 squared".
The square of 40 712 is 1 657 466 944 because 40 712 × 40 712 = 40 7122 = 1 657 466 944.
As a consequence, 40 712 is the square root of 1 657 466 944.
The multiples of 40 712 are all integers evenly divisible by 40 712, that is all numbers such that the remainder of the division by 40 712 is zero. There are infinitely many multiples of 40 712. The smallest multiples of 40 712 are: