It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 494 421 is not a prime number.
For example, 494 421 can be divided by 3: 494 421 / 3 = 164 807.
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For 494 421 to be a prime number, it would have been required that 494 421 has only two divisors, i.e., itself and 1.
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494 421 is an odd number, because it is not evenly divisible by 2.
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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 494 421 is about 703.151.
Thus, the square root of 494 421 is not an integer, and therefore 494 421 is not a square number.
The square of a number (here 494 421) is the result of the product of this number (494 421) by itself (i.e., 494 421 × 494 421); the square of 494 421 is sometimes called "raising 494 421 to the power 2", or "494 421 squared".
The square of 494 421 is 244 452 125 241 because 494 421 × 494 421 = 494 4212 = 244 452 125 241.
As a consequence, 494 421 is the square root of 244 452 125 241.
The multiples of 494 421 are all integers evenly divisible by 494 421, that is all numbers such that the remainder of the division by 494 421 is zero. There are infinitely many multiples of 494 421. The smallest multiples of 494 421 are: