Most computers store times and dates as a single number - the number of seconds since
1st January 1970 00:00:00. The
1184775522 you're getting means that the file was created 1184775522 seconds after that date.
In order to convert that number into a meaningful time and date you can use mIRC's
$asctime() identifier like so:
$asctime($file(%mircdir $+ K00005.txt).ctime)
You can also customise the formatting of the time and date using $asctime()'s second parameter. Take a look at $asctime in the help file for a description on how to do that.