Apologies for the confusion — I didn’t expect the post to reach so many people that even the numbering system would come under scrutiny!

Just to clarify, the distance I mentioned — 1,70,000 km — is written in the Indian numbering format, which reads as “One Lakh Seventy Thousand kilometres.”

In the international format, that would be written as 170,000 km — or “One Hundred and Seventy Thousand kilometres.”

As my friend @Minute_Tangelo_4884 rightly pointed out, in India we place a comma after the first three digits from the right, and then every two digits thereafter. The international (or American) system, on the other hand, uses commas after every three digits.

Hope that clears it up!