It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 409 074 is not a prime number.
For example, 409 074 can be divided by 2: 409 074 / 2 = 204 537.
For 409 074 to be a prime number, it would have been required that 409 074 has only two divisors, i.e., itself and 1.
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409 074 is an even number, because it is evenly divisible by 2: 409 074 / 2 = 204 537.
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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 409 074 is about 639.589.
Thus, the square root of 409 074 is not an integer, and therefore 409 074 is not a square number.
The square of a number (here 409 074) is the result of the product of this number (409 074) by itself (i.e., 409 074 × 409 074); the square of 409 074 is sometimes called "raising 409 074 to the power 2", or "409 074 squared".
The square of 409 074 is 167 341 537 476 because 409 074 × 409 074 = 409 0742 = 167 341 537 476.
As a consequence, 409 074 is the square root of 167 341 537 476.
The multiples of 409 074 are all integers evenly divisible by 409 074, that is all numbers such that the remainder of the division by 409 074 is zero. There are infinitely many multiples of 409 074. The smallest multiples of 409 074 are: