There are 19 ayaat in Surah al-Alaq and it was revealed in Makkah.
Imam Ja’far as-Sadiq (a.s.) said that whoever recites this surah in the daytime or at night and then passes away, he will be counted amongst the martyrs who died while fighting on the side of the Holy Prophet (s.a.w.)
See Also: Benefits of reciting Surah al-Jumuah
It is highly recommended to recite this surah while traveling and it acts as a safety from accidents. If recited on a treasure, it remains safe.