It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 427 474 is not a prime number.
For example, 427 474 can be divided by 2: 427 474 / 2 = 213 737.
For 427 474 to be a prime number, it would have been required that 427 474 has only two divisors, i.e., itself and 1.
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427 474 is an even number, because it is evenly divisible by 2: 427 474 / 2 = 213 737.
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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 427 474 is about 653.815.
Thus, the square root of 427 474 is not an integer, and therefore 427 474 is not a square number.
The square of a number (here 427 474) is the result of the product of this number (427 474) by itself (i.e., 427 474 × 427 474); the square of 427 474 is sometimes called "raising 427 474 to the power 2", or "427 474 squared".
The square of 427 474 is 182 734 020 676 because 427 474 × 427 474 = 427 4742 = 182 734 020 676.
As a consequence, 427 474 is the square root of 182 734 020 676.
The multiples of 427 474 are all integers evenly divisible by 427 474, that is all numbers such that the remainder of the division by 427 474 is zero. There are infinitely many multiples of 427 474. The smallest multiples of 427 474 are: