It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 425 402 is not a prime number.
For example, 425 402 can be divided by 2: 425 402 / 2 = 212 701.
For 425 402 to be a prime number, it would have been required that 425 402 has only two divisors, i.e., itself and 1.
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425 402 is an even number, because it is evenly divisible by 2: 425 402 / 2 = 212 701.
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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 425 402 is about 652.228.
Thus, the square root of 425 402 is not an integer, and therefore 425 402 is not a square number.
The square of a number (here 425 402) is the result of the product of this number (425 402) by itself (i.e., 425 402 × 425 402); the square of 425 402 is sometimes called "raising 425 402 to the power 2", or "425 402 squared".
The square of 425 402 is 180 966 861 604 because 425 402 × 425 402 = 425 4022 = 180 966 861 604.
As a consequence, 425 402 is the square root of 180 966 861 604.
The multiples of 425 402 are all integers evenly divisible by 425 402, that is all numbers such that the remainder of the division by 425 402 is zero. There are infinitely many multiples of 425 402. The smallest multiples of 425 402 are: