Formatting of numbers on y axis

Hello all. I have the following:

plot(salaries$yearID, salaries$salary, type='n', xaxt='n', xlab='',
yaxt='n', ylab='')
axis(1, at=unique(salaries$yearID), labels=unique(salaries$yearID), lwd=.25,
tck=-0.05)
axis(2, axTicks(2), format(axTicks(2), scientific = F))

Which nicely creates the Y axis with the raw numbers, which are in the range
of .5 - 7 million.

However, it displays them as "1000000", and so on- I'd like it to show just
whole numbers 1, 2, 3, through 7, so I can label the Y axis "in millions".
Any tips?