In mathematics, it’s rare to find a number that can be divided evenly by all the integers from 1 to 10.
Yet there exists one extraordinary number that defies this expectation — a number so remarkable that it has astonished mathematicians around the world.

This number is 2520.

At first glance, it seems like just another ordinary number. But in reality, it holds a unique property: 2520 is divisible by every number from 1 to 10 without leaving a remainder — whether the divisor is even or odd.

See for yourself:

2520 ÷ 1 = 2520
2520 ÷ 2 = 1260
2520 ÷ 3 = 840
2520 ÷ 4 = 630
2520 ÷ 5 = 504
2520 ÷ 6 = 420
2520 ÷ 7 = 360
2520 ÷ 8 = 315
2520 ÷ 9 = 280
2520 ÷ 10 = 252

The secret behind this number lies in a simple yet profound product:

7 × 30 × 12 = 2520

Here,
• 7 represents the days of the week,
• 30 represents the days in a month (in the traditional Indian Hindu calendar), and
• 12 represents the months in a year.

Thus, 2520 becomes not just a number, but a symbolic representation of time itself — its cycles, its rhythm, and its completeness.

This fascinating connection was brought to light by the brilliant mind of Sri Srinivasa Ramanujan, one of India’s greatest mathematical geniuses.