It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 42 004 142 is not a prime number.
For example, 42 004 142 can be divided by 2: 42 004 142 / 2 = 21 002 071.
For 42 004 142 to be a prime number, it would have been required that 42 004 142 has only two divisors, i.e., itself and 1.
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42 004 142 is an even number, because it is evenly divisible by 2: 42 004 142 / 2 = 21 002 071.
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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 42 004 142 is about 6 481.060.
Thus, the square root of 42 004 142 is not an integer, and therefore 42 004 142 is not a square number.
The square of a number (here 42 004 142) is the result of the product of this number (42 004 142) by itself (i.e., 42 004 142 × 42 004 142); the square of 42 004 142 is sometimes called "raising 42 004 142 to the power 2", or "42 004 142 squared".
The square of 42 004 142 is 1 764 347 945 156 164 because 42 004 142 × 42 004 142 = 42 004 1422 = 1 764 347 945 156 164.
As a consequence, 42 004 142 is the square root of 1 764 347 945 156 164.
42 004 142 is a number with 8 digits.
The multiples of 42 004 142 are all integers evenly divisible by 42 004 142, that is all numbers such that the remainder of the division by 42 004 142 is zero. There are infinitely many multiples of 42 004 142. The smallest multiples of 42 004 142 are: