It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 105 008 is not a prime number.
For example, 42 105 008 can be divided by 2: 42 105 008 / 2 = 21 052 504.
For 42 105 008 to be a prime number, it would have been required that 42 105 008 has only two divisors, i.e., itself and 1.
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42 105 008 is an even number, because it is evenly divisible by 2: 42 105 008 / 2 = 21 052 504.
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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 42 105 008 is about 6 488.837.
Thus, the square root of 42 105 008 is not an integer, and therefore 42 105 008 is not a square number.
The square of a number (here 42 105 008) is the result of the product of this number (42 105 008) by itself (i.e., 42 105 008 × 42 105 008); the square of 42 105 008 is sometimes called "raising 42 105 008 to the power 2", or "42 105 008 squared".
The square of 42 105 008 is 1 772 831 698 680 064 because 42 105 008 × 42 105 008 = 42 105 0082 = 1 772 831 698 680 064.
As a consequence, 42 105 008 is the square root of 1 772 831 698 680 064.
42 105 008 is a number with 8 digits.
The multiples of 42 105 008 are all integers evenly divisible by 42 105 008, that is all numbers such that the remainder of the division by 42 105 008 is zero. There are infinitely many multiples of 42 105 008. The smallest multiples of 42 105 008 are: