It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 16 801 is not a prime number.
For example, 16 801 can be divided by 53: 16 801 / 53 = 317.
For 16 801 to be a prime number, it would have been required that 16 801 has only two divisors, i.e., itself and 1.
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16 801 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 16 801 is about 129.619.
Thus, the square root of 16 801 is not an integer, and therefore 16 801 is not a square number.
The square of a number (here 16 801) is the result of the product of this number (16 801) by itself (i.e., 16 801 × 16 801); the square of 16 801 is sometimes called "raising 16 801 to the power 2", or "16 801 squared".
The square of 16 801 is 282 273 601 because 16 801 × 16 801 = 16 8012 = 282 273 601.
As a consequence, 16 801 is the square root of 282 273 601.
The multiples of 16 801 are all integers evenly divisible by 16 801, that is all numbers such that the remainder of the division by 16 801 is zero. There are infinitely many multiples of 16 801. The smallest multiples of 16 801 are: