It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 16 129 is not a prime number.
For example, 16 129 can be divided by 127: 16 129 / 127 = 127.
For 16 129 to be a prime number, it would have been required that 16 129 has only two divisors, i.e., itself and 1.
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16 129 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 16 129 is 127.
Therefore, the square root of 16 129 is an integer, and as a consequence 16 129 is a perfect square.
The square of a number (here 16 129) is the result of the product of this number (16 129) by itself (i.e., 16 129 × 16 129); the square of 16 129 is sometimes called "raising 16 129 to the power 2", or "16 129 squared".
The square of 16 129 is 260 144 641 because 16 129 × 16 129 = 16 1292 = 260 144 641.
As a consequence, 16 129 is the square root of 260 144 641.
The multiples of 16 129 are all integers evenly divisible by 16 129, that is all numbers such that the remainder of the division by 16 129 is zero. There are infinitely many multiples of 16 129. The smallest multiples of 16 129 are: