2 is the first actually 'numbery' number.
1 [and 0] isn't a numbery number, like the rest.
All it means is that there is a whole non-zero quantity of something, and that's not very numbery, while other numbers denote that plus a relevant quantity (more than just "it exists"). One is so unnumbery that multiplying anything by one means nothing changes, and doing any other number to the power of 0 gives a 1. 1 is neither a prime nor a multiple of primes.
It is important and all, but it isn't 'numbery'.
And then you have 2, it is a prime, it denotes a quantity more than "it exists", multiplying other numbers by it gives other numbers and it also has cool roles, like appearing in a square root.

Yes, this was a rant about 2 being the first actual number