Enchants level capped at 255 when integer limit is 2147483647

So when i give myself an item that has a enchant over lvl 255 like so: /give @p acacia_sign{Enchantments:[

{id:fortune,lvl:123456}

]} 1

The enchant that is shown on the item has lvl of 255, the functionality of the enchant is also like lvl 255

but when i use /data get entity @s it shows the exact level of enchant

The integer limit in 32bit is 2147483647 so it is weird that enchants are capped at 255