It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 127 402 is not a prime number.
For example, 127 402 can be divided by 2: 127 402 / 2 = 63 701.
For 127 402 to be a prime number, it would have been required that 127 402 has only two divisors, i.e., itself and 1.
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127 402 is an even number, because it is evenly divisible by 2: 127 402 / 2 = 63 701.
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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 127 402 is about 356.934.
Thus, the square root of 127 402 is not an integer, and therefore 127 402 is not a square number.
The square of a number (here 127 402) is the result of the product of this number (127 402) by itself (i.e., 127 402 × 127 402); the square of 127 402 is sometimes called "raising 127 402 to the power 2", or "127 402 squared".
The square of 127 402 is 16 231 269 604 because 127 402 × 127 402 = 127 4022 = 16 231 269 604.
As a consequence, 127 402 is the square root of 16 231 269 604.
The multiples of 127 402 are all integers evenly divisible by 127 402, that is all numbers such that the remainder of the division by 127 402 is zero. There are infinitely many multiples of 127 402. The smallest multiples of 127 402 are: