It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 409 672 is not a prime number.
For example, 42 409 672 can be divided by 2: 42 409 672 / 2 = 21 204 836.
For 42 409 672 to be a prime number, it would have been required that 42 409 672 has only two divisors, i.e., itself and 1.
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42 409 672 is an even number, because it is evenly divisible by 2: 42 409 672 / 2 = 21 204 836.
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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 42 409 672 is about 6 512.271.
Thus, the square root of 42 409 672 is not an integer, and therefore 42 409 672 is not a square number.
The square of a number (here 42 409 672) is the result of the product of this number (42 409 672) by itself (i.e., 42 409 672 × 42 409 672); the square of 42 409 672 is sometimes called "raising 42 409 672 to the power 2", or "42 409 672 squared".
The square of 42 409 672 is 1 798 580 279 147 584 because 42 409 672 × 42 409 672 = 42 409 6722 = 1 798 580 279 147 584.
As a consequence, 42 409 672 is the square root of 1 798 580 279 147 584.
42 409 672 is a number with 8 digits.
The multiples of 42 409 672 are all integers evenly divisible by 42 409 672, that is all numbers such that the remainder of the division by 42 409 672 is zero. There are infinitely many multiples of 42 409 672. The smallest multiples of 42 409 672 are: