It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 267 491 is not a prime number.
For example, 267 491 can be divided by 7: 267 491 / 7 = 38 213.
For 267 491 to be a prime number, it would have been required that 267 491 has only two divisors, i.e., itself and 1.
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267 491 is an odd number, because it is not evenly divisible by 2.
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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 267 491 is about 517.195.
Thus, the square root of 267 491 is not an integer, and therefore 267 491 is not a square number.
The square of a number (here 267 491) is the result of the product of this number (267 491) by itself (i.e., 267 491 × 267 491); the square of 267 491 is sometimes called "raising 267 491 to the power 2", or "267 491 squared".
The square of 267 491 is 71 551 435 081 because 267 491 × 267 491 = 267 4912 = 71 551 435 081.
As a consequence, 267 491 is the square root of 71 551 435 081.
The multiples of 267 491 are all integers evenly divisible by 267 491, that is all numbers such that the remainder of the division by 267 491 is zero. There are infinitely many multiples of 267 491. The smallest multiples of 267 491 are: