It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 267 021 is not a prime number.
For example, 267 021 can be divided by 3: 267 021 / 3 = 89 007.
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For 267 021 to be a prime number, it would have been required that 267 021 has only two divisors, i.e., itself and 1.
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267 021 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 267 021 is about 516.741.
Thus, the square root of 267 021 is not an integer, and therefore 267 021 is not a square number.
The square of a number (here 267 021) is the result of the product of this number (267 021) by itself (i.e., 267 021 × 267 021); the square of 267 021 is sometimes called "raising 267 021 to the power 2", or "267 021 squared".
The square of 267 021 is 71 300 214 441 because 267 021 × 267 021 = 267 0212 = 71 300 214 441.
As a consequence, 267 021 is the square root of 71 300 214 441.
The multiples of 267 021 are all integers evenly divisible by 267 021, that is all numbers such that the remainder of the division by 267 021 is zero. There are infinitely many multiples of 267 021. The smallest multiples of 267 021 are: