The Richter scale is a logarithmic scale (base 10).
log10(I/R)=log10(105760)=5.02.
However, if I1 and I2 are the intensities of two earthquakes and R1 and R2 are their respective Richter scale numbers, then in practice, R2-R1=1.0 when I2/I1=√1000, that is log(I2/I1)=3/2=1.5. So I2 is about 32 times stronger than I1, because 32 is approximately √1000. A difference of 2 on the Richter scale means 1,000 times (322 approx=103) stronger. A difference of 3 (104.5) means about 32,000 times stronger. A difference of 4 (106) means 1,000,000 times stronger.
If the reference earthquake has a Richter value of r (intensity=R) and 5.02/1.5=3.35 approx, then "I" should correspond to about 3.35+r. So if, r=1 then I=4.35 on the Richter scale.