It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 427 402 is not a prime number.
For example, 427 402 can be divided by 2: 427 402 / 2 = 213 701.
For 427 402 to be a prime number, it would have been required that 427 402 has only two divisors, i.e., itself and 1.
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427 402 is an even number, because it is evenly divisible by 2: 427 402 / 2 = 213 701.
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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 427 402 is about 653.760.
Thus, the square root of 427 402 is not an integer, and therefore 427 402 is not a square number.
The square of a number (here 427 402) is the result of the product of this number (427 402) by itself (i.e., 427 402 × 427 402); the square of 427 402 is sometimes called "raising 427 402 to the power 2", or "427 402 squared".
The square of 427 402 is 182 672 469 604 because 427 402 × 427 402 = 427 4022 = 182 672 469 604.
As a consequence, 427 402 is the square root of 182 672 469 604.
The multiples of 427 402 are all integers evenly divisible by 427 402, that is all numbers such that the remainder of the division by 427 402 is zero. There are infinitely many multiples of 427 402. The smallest multiples of 427 402 are: