What is the next number of the series - 2, 7, 27, 107, 427, ??

Answer 1

It follows the below logic
2 + 5 = 7
7 + 20 = 27
27 + 80 = 107
107 + 320 = 427
Then,
5 x 4 = 20
20 x 4 = 80
80 x 4 = 320
Therefore,
320 x 4 = 1280
The number is 427 + 1280 = 1707