It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 1 243 is not a prime number.
For example, 1 243 can be divided by 11: 1 243 / 11 = 113.
For 1 243 to be a prime number, it would have been required that 1 243 has only two divisors, i.e., itself and 1.
Find out more:
1 243 is an odd number, because it is not evenly divisible by 2.
Find out more:
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 1 243 is about 35.256.
Thus, the square root of 1 243 is not an integer, and therefore 1 243 is not a square number.
The square of a number (here 1 243) is the result of the product of this number (1 243) by itself (i.e., 1 243 × 1 243); the square of 1 243 is sometimes called "raising 1 243 to the power 2", or "1 243 squared".
The square of 1 243 is 1 545 049 because 1 243 × 1 243 = 1 2432 = 1 545 049.
The multiples of 1 243 are all integers evenly divisible by 1 243, that is all numbers such that the remainder of the division by 1 243 is zero. There are infinitely many multiples of 1 243. The smallest multiples of 1 243 are: