It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 40 842 729 is not a prime number.
For example, 40 842 729 can be divided by 3: 40 842 729 / 3 = 13 614 243.
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For 40 842 729 to be a prime number, it would have been required that 40 842 729 has only two divisors, i.e., itself and 1.
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40 842 729 is an odd number, because it is not evenly divisible by 2.
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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 40 842 729 is about 6 390.832.
Thus, the square root of 40 842 729 is not an integer, and therefore 40 842 729 is not a square number.
The square of a number (here 40 842 729) is the result of the product of this number (40 842 729) by itself (i.e., 40 842 729 × 40 842 729); the square of 40 842 729 is sometimes called "raising 40 842 729 to the power 2", or "40 842 729 squared".
The square of 40 842 729 is 1 668 128 512 167 441 because 40 842 729 × 40 842 729 = 40 842 7292 = 1 668 128 512 167 441.
As a consequence, 40 842 729 is the square root of 1 668 128 512 167 441.
40 842 729 is a number with 8 digits.
The multiples of 40 842 729 are all integers evenly divisible by 40 842 729, that is all numbers such that the remainder of the division by 40 842 729 is zero. There are infinitely many multiples of 40 842 729. The smallest multiples of 40 842 729 are: