It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 397 481 is not a prime number.
For example, 397 481 can be divided by 7: 397 481 / 7 = 56 783.
For 397 481 to be a prime number, it would have been required that 397 481 has only two divisors, i.e., itself and 1.
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397 481 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 397 481 is about 630.461.
Thus, the square root of 397 481 is not an integer, and therefore 397 481 is not a square number.
The square of a number (here 397 481) is the result of the product of this number (397 481) by itself (i.e., 397 481 × 397 481); the square of 397 481 is sometimes called "raising 397 481 to the power 2", or "397 481 squared".
The square of 397 481 is 157 991 145 361 because 397 481 × 397 481 = 397 4812 = 157 991 145 361.
As a consequence, 397 481 is the square root of 157 991 145 361.
The multiples of 397 481 are all integers evenly divisible by 397 481, that is all numbers such that the remainder of the division by 397 481 is zero. There are infinitely many multiples of 397 481. The smallest multiples of 397 481 are: