2 & 7 always go hand in hand.
Rajesh Khanna is also no.2 like super star Amitabh Bachchan & Shah Rukh Khan & Ajay Devgn.All are no.2.
Rajesh Khanna is no.2(29 December 1942) is running in his lucky 70th(7) year.
He got havells advertisement this year also his daughter Twinkle Khanna got pregnant second time this year.
As 4 is very lucky for 2.
Rajesh Khanna shared special relationship with both Kishore Kumar(4 aug.) & Mumtaz(31 july) Both are no.4.
The Kishore Kumar-Rajesh Khanna combination worked miracles and it was almost impossible to see them as separate identities. They became a singer-actor duo and together they gave many songs till 1991.
Rajesh acted alongside Mumtaz in eight successful films.They were neighbours and got along very well, and as a result they shared a great on-screen chemistry.

As 1 & 2 are his lucky numbers.He gave 15 consecutive solo superhits in his 28th(1) 29th(2) & 30th(3) year{3 is good for making money} which is still an unbroken record in Indian film history.
Khanna considered considered another no.2 Dilip Kumar(11 dec.) & Meena Kumari(no.1 born on 1 aug) as his idols.

RD Burman was Cancerian ruled by 2 like Khanna who is also ruled by 2.Work of Pancham with Khanna is regarded as legendary and far superior than any other actor-music director combinations.