This is the first Contra game to not use the word Contra in the game's title.
573, the number featured in this game, is what Konami stands for. The boss of Stage 3 has 573 in its name, and the Uprising R cheat code, which is unlocked with the Konami Code on the game's title screen, also costs 57,300,000 corps points. Also, the longer you play the game, the more credits you can gain, which is a total of 573.
The purchasable 1-UPs in Rising Mode are all references to previous Contra games. Uprising S is Super Contra, Uprising OC is Operation C, Uprising III is Contra III: The Alien Wars, Uprising HC is Contra: Hard Corps, Uprising SS is Contra: Shattered Soldier, Uprising N is Neo Contra, Uprising DS is Contra: Dual Spirits, or Contra 4, and the unlock-able Uprising R is Contra ReBirth.