It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 267 642 is not a prime number.
For example, 267 642 can be divided by 2: 267 642 / 2 = 133 821.
For 267 642 to be a prime number, it would have been required that 267 642 has only two divisors, i.e., itself and 1.
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267 642 is an even number, because it is evenly divisible by 2: 267 642 / 2 = 133 821.
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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 267 642 is about 517.341.
Thus, the square root of 267 642 is not an integer, and therefore 267 642 is not a square number.
The square of a number (here 267 642) is the result of the product of this number (267 642) by itself (i.e., 267 642 × 267 642); the square of 267 642 is sometimes called "raising 267 642 to the power 2", or "267 642 squared".
The square of 267 642 is 71 632 240 164 because 267 642 × 267 642 = 267 6422 = 71 632 240 164.
As a consequence, 267 642 is the square root of 71 632 240 164.
The multiples of 267 642 are all integers evenly divisible by 267 642, that is all numbers such that the remainder of the division by 267 642 is zero. There are infinitely many multiples of 267 642. The smallest multiples of 267 642 are: