It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 601 644 is not a prime number.
For example, 601 644 can be divided by 2: 601 644 / 2 = 300 822.
For 601 644 to be a prime number, it would have been required that 601 644 has only two divisors, i.e., itself and 1.
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601 644 is an even number, because it is evenly divisible by 2: 601 644 / 2 = 300 822.
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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 601 644 is about 775.657.
Thus, the square root of 601 644 is not an integer, and therefore 601 644 is not a square number.
The square of a number (here 601 644) is the result of the product of this number (601 644) by itself (i.e., 601 644 × 601 644); the square of 601 644 is sometimes called "raising 601 644 to the power 2", or "601 644 squared".
The square of 601 644 is 361 975 502 736 because 601 644 × 601 644 = 601 6442 = 361 975 502 736.
As a consequence, 601 644 is the square root of 361 975 502 736.
The multiples of 601 644 are all integers evenly divisible by 601 644, that is all numbers such that the remainder of the division by 601 644 is zero. There are infinitely many multiples of 601 644. The smallest multiples of 601 644 are: