“Little Big Shots”

7 p.m. Sunday on NBC

The things his 5-year-old son can do with numbers leave Luis Esquivel Sr. speechless on a regular basis.

Luis Jr. is a bona fide math whiz. He can square numbers from one to 250 and cube them from one to 50. Ask him to find the square root of a number in that range and he’ll tell you after doing the math — like he does for other problems — in his head.

The boy and his father often play a doubling game that goes like this: One says a number and the other doubles it. Then the new number is doubled. It goes back and forth until one of them can’t go any further.

This mental agility earned the Solomon Elementary kindergartner an appearance on the new hit NBC variety show “Little Big Shots,” hosted by comedian Steve Harvey, when it airs at 7 p.m. Sunday. A casting agent approached the Esquivel family after seeing a Facebook video of the boy doing math problems.

“The stuff he can do for his age is incredible,” said the elder Esquivel, a 35-year-old Army staff sergeant assigned to Schofield Barracks. He and his wife, a homemaker and mother of four, couldn’t believe what their son began doing six months ago.

None of their other children exhibit the same talent. In fact, the oldest, who is 9, regularly asks Luis Jr. for math help.

“We were blown away and would try to get him to something harder and harder,” said his father, who taught his son the basics of multiplication. “I didn’t know what to think. I was floored. Did he just do that?”

The rest of his son’s life is more along normal lines. Luis Jr. likes pizza, playing games on his iPad and bouncing on the family trampoline.

Numbers aren’t the boy’s only fascination. When he was 2, his father was talking to a friend when Luis Jr. told them he could recite the alphabet. Unimpressed, the friend told the lad to recite the alphabet backward.

And he did.