It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 267 636 is not a prime number.
For example, 267 636 can be divided by 2: 267 636 / 2 = 133 818.
For 267 636 to be a prime number, it would have been required that 267 636 has only two divisors, i.e., itself and 1.
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267 636 is an even number, because it is evenly divisible by 2: 267 636 / 2 = 133 818.
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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 267 636 is about 517.335.
Thus, the square root of 267 636 is not an integer, and therefore 267 636 is not a square number.
The square of a number (here 267 636) is the result of the product of this number (267 636) by itself (i.e., 267 636 × 267 636); the square of 267 636 is sometimes called "raising 267 636 to the power 2", or "267 636 squared".
The square of 267 636 is 71 629 028 496 because 267 636 × 267 636 = 267 6362 = 71 629 028 496.
As a consequence, 267 636 is the square root of 71 629 028 496.
The multiples of 267 636 are all integers evenly divisible by 267 636, that is all numbers such that the remainder of the division by 267 636 is zero. There are infinitely many multiples of 267 636. The smallest multiples of 267 636 are: