crontab job

[hadi motamedi]

Dear All
We have one HP t5725 server with Debian Linux 3.1 installed. We have
received the following instruction command to be set as crontab job for root
user, as the followings :
45 1 * * * find /usr/local/statsvr/counters/main/processed -atime +60 -exec
rm -f {} ';'
Can you please let us know what is the meaning of "-atime" & "-exec"
commands used here ?
Let me thank you in advance
Regards
H.Motamedi