For 401 to be an integer, 401 has to be a whole number. Furthermore, for 401 to be an integer, you should be able to write 401 without a fractional or decimal component.
401 is a whole number that can be written without a fractional component, thus 401 is an integer.
The answer to the question: "Is 401 an integer?" is YES.
Integer?
Check other numbers to see if they are integers.
Is 402 an Integer?
Here is a similar question you may be interested in.
More Information from Research Maniacs:
Is 401 a prime number?
Now you know that 401 is an integer, but do you know if 401 is a prime number?
What are the factors of 401?
What are the factors of the integer 401 you ask?
Is 401 a square number?
Find out if 401 is a perfect square number!
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