It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 749 021 is not a prime number.
For example, 749 021 can be divided by 7: 749 021 / 7 = 107 003.
For 749 021 to be a prime number, it would have been required that 749 021 has only two divisors, i.e., itself and 1.
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749 021 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 749 021 is about 865.460.
Thus, the square root of 749 021 is not an integer, and therefore 749 021 is not a square number.
The square of a number (here 749 021) is the result of the product of this number (749 021) by itself (i.e., 749 021 × 749 021); the square of 749 021 is sometimes called "raising 749 021 to the power 2", or "749 021 squared".
The square of 749 021 is 561 032 458 441 because 749 021 × 749 021 = 749 0212 = 561 032 458 441.
As a consequence, 749 021 is the square root of 561 032 458 441.
The multiples of 749 021 are all integers evenly divisible by 749 021, that is all numbers such that the remainder of the division by 749 021 is zero. There are infinitely many multiples of 749 021. The smallest multiples of 749 021 are: