4128

4128 = 2 x 2 x 2 x 2 x 2 x 3 x 43.

4128 is the smallest number with the property that its first 10 multiples contain the digit 2.

4128 is 1000000100000 in base 2 (binary), 1000200 in base 4, 10040 in base 8, and 1020 in base 16. It is 15015 in base 7 and 3113 in base 11.

4128 is a divisor of 49⁶ - 1.

4128 is a number that can be expressed as the difference of the squares of primes in just two distinct ways (A090788).

4128 = 8⁴ + 8 x 4.

Source: What's Special About This Number?