It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 13 402 is not a prime number.
For example, 13 402 can be divided by 2: 13 402 / 2 = 6 701.
For 13 402 to be a prime number, it would have been required that 13 402 has only two divisors, i.e., itself and 1.
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13 402 is an even number, because it is evenly divisible by 2: 13 402 / 2 = 6 701.
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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 13 402 is about 115.767.
Thus, the square root of 13 402 is not an integer, and therefore 13 402 is not a square number.
The square of a number (here 13 402) is the result of the product of this number (13 402) by itself (i.e., 13 402 × 13 402); the square of 13 402 is sometimes called "raising 13 402 to the power 2", or "13 402 squared".
The square of 13 402 is 179 613 604 because 13 402 × 13 402 = 13 4022 = 179 613 604.
As a consequence, 13 402 is the square root of 179 613 604.
The multiples of 13 402 are all integers evenly divisible by 13 402, that is all numbers such that the remainder of the division by 13 402 is zero. There are infinitely many multiples of 13 402. The smallest multiples of 13 402 are: