It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 267 842 is not a prime number.
For example, 267 842 can be divided by 2: 267 842 / 2 = 133 921.
For 267 842 to be a prime number, it would have been required that 267 842 has only two divisors, i.e., itself and 1.
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267 842 is an even number, because it is evenly divisible by 2: 267 842 / 2 = 133 921.
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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 267 842 is about 517.535.
Thus, the square root of 267 842 is not an integer, and therefore 267 842 is not a square number.
The square of a number (here 267 842) is the result of the product of this number (267 842) by itself (i.e., 267 842 × 267 842); the square of 267 842 is sometimes called "raising 267 842 to the power 2", or "267 842 squared".
The square of 267 842 is 71 739 336 964 because 267 842 × 267 842 = 267 8422 = 71 739 336 964.
As a consequence, 267 842 is the square root of 71 739 336 964.
The multiples of 267 842 are all integers evenly divisible by 267 842, that is all numbers such that the remainder of the division by 267 842 is zero. There are infinitely many multiples of 267 842. The smallest multiples of 267 842 are: