It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 40 502 is not a prime number.
For example, 40 502 can be divided by 2: 40 502 / 2 = 20 251.
For 40 502 to be a prime number, it would have been required that 40 502 has only two divisors, i.e., itself and 1.
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40 502 is an even number, because it is evenly divisible by 2: 40 502 / 2 = 20 251.
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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 40 502 is about 201.251.
Thus, the square root of 40 502 is not an integer, and therefore 40 502 is not a square number.
The square of a number (here 40 502) is the result of the product of this number (40 502) by itself (i.e., 40 502 × 40 502); the square of 40 502 is sometimes called "raising 40 502 to the power 2", or "40 502 squared".
The square of 40 502 is 1 640 412 004 because 40 502 × 40 502 = 40 5022 = 1 640 412 004.
As a consequence, 40 502 is the square root of 1 640 412 004.
The multiples of 40 502 are all integers evenly divisible by 40 502, that is all numbers such that the remainder of the division by 40 502 is zero. There are infinitely many multiples of 40 502. The smallest multiples of 40 502 are: