It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 267 416 is not a prime number.
For example, 267 416 can be divided by 2: 267 416 / 2 = 133 708.
For 267 416 to be a prime number, it would have been required that 267 416 has only two divisors, i.e., itself and 1.
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267 416 is an even number, because it is evenly divisible by 2: 267 416 / 2 = 133 708.
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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 267 416 is about 517.123.
Thus, the square root of 267 416 is not an integer, and therefore 267 416 is not a square number.
The square of a number (here 267 416) is the result of the product of this number (267 416) by itself (i.e., 267 416 × 267 416); the square of 267 416 is sometimes called "raising 267 416 to the power 2", or "267 416 squared".
The square of 267 416 is 71 511 317 056 because 267 416 × 267 416 = 267 4162 = 71 511 317 056.
As a consequence, 267 416 is the square root of 71 511 317 056.
The multiples of 267 416 are all integers evenly divisible by 267 416, that is all numbers such that the remainder of the division by 267 416 is zero. There are infinitely many multiples of 267 416. The smallest multiples of 267 416 are: