This is likely a database tracker ID or a specific release number used by the site or group that hosted the file. Important Security Considerations
Without the other parts, this file is non-functional. sc23857-BGCODv1245.part1 (2).rar
Generic alphanumeric strings like "sc23857" are often used by automated systems to distribute adware or trojans . This is likely a database tracker ID or
"COD" almost certainly refers to Call of Duty . The "BG" may refer to a specific repack group or "Battleground" edition, while "v1245" indicates the specific version or build number of the software. "COD" almost certainly refers to Call of Duty
This suggests the file was downloaded twice or renamed by your operating system because a file with the exact same name already existed in your download directory.
Based on the naming conventions used in file-sharing communities,
A compressed archive that requires software like WinRAR or 7-Zip to open.