It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 742 649 is not a prime number.
For example, 742 649 can be divided by 167: 742 649 / 167 = 4 447.
For 742 649 to be a prime number, it would have been required that 742 649 has only two divisors, i.e., itself and 1.
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742 649 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 742 649 is about 861.771.
Thus, the square root of 742 649 is not an integer, and therefore 742 649 is not a square number.
The square of a number (here 742 649) is the result of the product of this number (742 649) by itself (i.e., 742 649 × 742 649); the square of 742 649 is sometimes called "raising 742 649 to the power 2", or "742 649 squared".
The square of 742 649 is 551 527 537 201 because 742 649 × 742 649 = 742 6492 = 551 527 537 201.
As a consequence, 742 649 is the square root of 551 527 537 201.
The multiples of 742 649 are all integers evenly divisible by 742 649, that is all numbers such that the remainder of the division by 742 649 is zero. There are infinitely many multiples of 742 649. The smallest multiples of 742 649 are: