Interesting Facts about Islam
Most Influential Person
The most influential person in history is Prophet Muhammad (S.A.W). 
Most Common Name
"Muhammad" is the most common name in the world. 
Sahabahs Promised Paradise
The 10 Sahabahs who were promised Paradise during their lifetime were Abu Bakr Siddiq, Umar Bin Khattab, Uthman Bin Affan, Ali Bin Abi Talib, Talha Bin Ubaidullah, Said Bin Zaid, Abu Ubaidah Bin Jarrah, Zubair bin Awwam, Sa'ad Bin Abi Waqqas and Abdur Rahman Bin Auf RadiAllahu 'Anhum Ajma'in (R.A). 
Ali bin Abi Talib (R.A) walked all the way from Mekkah to Madinah, at the time of Hijrah, while hiding from the people of Quraish who were pursuing him. Now, that's long, long walk. 
All of Prophet Muhammad (S.A.W)'s children died before him except for his daughter, Fatimah (R.A). 
Mothers of the Ummah
The 2 wives of the Prophet (S.A.W) who died before him was Khadija (R.A) and Zainab Binte Khuzaimah (R.A).
Adam (A.S) was about 30 Ziraas tall. 1 Ziraa is approximately half a metre, so he was about 15 metres tall. 
The first Hafiz (one who memorizes the Qur'an) of the Holy Qur'an after Muhammad (S.A.W) was Uthman Bin Affan (R.A).
Die as a Martyr
Amr bin Thabit (R.A) became a muslim during the battle of Uhud, and died as a martyr in the same battle. When asked about him, Rasulullah (SAW) said that he was from the People of Paradise, even though he had not prayed a single solah.
Abu Lahab's Death
The wife of Abu Lahab's brother (Abbas (R.A)), Umul-Fadl (R.A) caused Abu Lahab's death. Abu Lahab started abusing a muslim servant on hearing about the defeat of the kafirs at Badr. Umul-Fadl (R.A) then took a log and hit him, which caused his skull to crack. He died a few days later from that injury. 
Country with Highest Muslim Population
Indonesia is the country with the most number of Muslims - 204,847,000.
Muslims in Europe
The most Muslim-populated country in Europe with over 90% Muslims is Albania.
The Quran will Remain
If all Qurans in the world today were destroyed, the original Arabic would still exist. The reason is millions of Muslims, have memorized the whole of the Quran letter for letter from beginning to end. In addition, chapters from the Quran are precisely recited from memory by every Muslim in each of the five daily prayers.
Islam literally means "peace (through the submission to God)".
Islam and Terrorism
Islam is against terrorism, violence and the killings of innocents. Islam is a religion of peace. Terrorists who claim to be Muslims aren't following the Islamic teachings.
Islam teaches that there is no compulsion in religion. 
Other References: http://www.quranicsciences.com/DidYouKnow.asp