It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 490 321 is not a prime number.
For example, 490 321 can be divided by 13: 490 321 / 13 = 37 717.
For 490 321 to be a prime number, it would have been required that 490 321 has only two divisors, i.e., itself and 1.
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490 321 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 490 321 is about 700.229.
Thus, the square root of 490 321 is not an integer, and therefore 490 321 is not a square number.
The square of a number (here 490 321) is the result of the product of this number (490 321) by itself (i.e., 490 321 × 490 321); the square of 490 321 is sometimes called "raising 490 321 to the power 2", or "490 321 squared".
The square of 490 321 is 240 414 683 041 because 490 321 × 490 321 = 490 3212 = 240 414 683 041.
As a consequence, 490 321 is the square root of 240 414 683 041.
The multiples of 490 321 are all integers evenly divisible by 490 321, that is all numbers such that the remainder of the division by 490 321 is zero. There are infinitely many multiples of 490 321. The smallest multiples of 490 321 are: