It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 421 272 is not a prime number.
For example, 421 272 can be divided by 2: 421 272 / 2 = 210 636.
For 421 272 to be a prime number, it would have been required that 421 272 has only two divisors, i.e., itself and 1.
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421 272 is an even number, because it is evenly divisible by 2: 421 272 / 2 = 210 636.
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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 421 272 is about 649.055.
Thus, the square root of 421 272 is not an integer, and therefore 421 272 is not a square number.
The square of a number (here 421 272) is the result of the product of this number (421 272) by itself (i.e., 421 272 × 421 272); the square of 421 272 is sometimes called "raising 421 272 to the power 2", or "421 272 squared".
The square of 421 272 is 177 470 097 984 because 421 272 × 421 272 = 421 2722 = 177 470 097 984.
As a consequence, 421 272 is the square root of 177 470 097 984.
The multiples of 421 272 are all integers evenly divisible by 421 272, that is all numbers such that the remainder of the division by 421 272 is zero. There are infinitely many multiples of 421 272. The smallest multiples of 421 272 are: