It is possible to find out using mathematical methods whether a given integer is a prime number or not.
No, 46 421 is not a prime number.
For example, 46 421 can be divided by 61: 46 421 / 61 = 761.
For 46 421 to be a prime number, it would have been required that 46 421 has only two divisors, i.e., itself and 1.
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46 421 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 46 421 is about 215.455.
Thus, the square root of 46 421 is not an integer, and therefore 46 421 is not a square number.
The square of a number (here 46 421) is the result of the product of this number (46 421) by itself (i.e., 46 421 × 46 421); the square of 46 421 is sometimes called "raising 46 421 to the power 2", or "46 421 squared".
The square of 46 421 is 2 154 909 241 because 46 421 × 46 421 = 46 4212 = 2 154 909 241.
As a consequence, 46 421 is the square root of 2 154 909 241.
The multiples of 46 421 are all integers evenly divisible by 46 421, that is all numbers such that the remainder of the division by 46 421 is zero. There are infinitely many multiples of 46 421. The smallest multiples of 46 421 are: