Instruct: How many people live in an area that has a population in Rosenthal smaller than 2,460 while having a population of 4,639 for Glegallan as well as having an Allora population greater than 2,106?
Output: SELECT COUNT Population (Region total) FROM table WHERE Population (Rosenthal) < 2,460 AND Population (Glengallan) = 4,639 AND Population (Allora) > 2,106