The biggest number that you can create using 1234 is 4321.
4*4*2+2*3
3*(2+4)-1 = 17
(1+4) x (2 x 3)
4+2+1=7 7*3=21
How about: 2*(1+3+4) = 16
to get the number 25 using 1234 = 31 - 2 - 4
4x4x3+2
(12*4)+3 = 51
By the uniqueness of numbers, the only number for 1234 is 1234 itself.
1234 is not a prime number.
The number of variations (or permutations) of the digits in the number 1234 can be calculated using the factorial of the number of digits. Since there are 4 unique digits, the number of permutations is 4! (4 factorial), which equals 24. Therefore, there are 24 different variations of the digits 1234.
Using the number lock press alt 1234
4*4*2+2*3
3*(2+4)-1 = 17
There are twelve possible solutions using the rule you stated.
(1+4) x (2 x 3)
2^(4+1)-3