It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 742 121 is not a prime number.
For example, 742 121 can be divided by 19: 742 121 / 19 = 39 059.
For 742 121 to be a prime number, it would have been required that 742 121 has only two divisors, i.e., itself and 1.
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742 121 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 742 121 is about 861.464.
Thus, the square root of 742 121 is not an integer, and therefore 742 121 is not a square number.
The square of a number (here 742 121) is the result of the product of this number (742 121) by itself (i.e., 742 121 × 742 121); the square of 742 121 is sometimes called "raising 742 121 to the power 2", or "742 121 squared".
The square of 742 121 is 550 743 578 641 because 742 121 × 742 121 = 742 1212 = 550 743 578 641.
As a consequence, 742 121 is the square root of 550 743 578 641.
The multiples of 742 121 are all integers evenly divisible by 742 121, that is all numbers such that the remainder of the division by 742 121 is zero. There are infinitely many multiples of 742 121. The smallest multiples of 742 121 are: