The Jehovah’s Witnesses have a bad habit of knocking on your door at the worst possible time because they believe they are doing God’s work to save you from the coming Tribulation that is foretold in the Book of Revelation. Sadly, this is again another literal interpretation of scripture when the Bible itself is very clear not to do just that.

2 Corinthians (KJV)

⁶ Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.

Even the early founding church fathers knew not to read them literally.

Church Father Origen says the following:
“The Scriptures were of little use to those who understood them literally, as they are written.” Higgins Anacalypsis II, Page 270

St. Athanasius likewise had this to say:
“Should we understand sacred writ according to the letter, we should fall into the most enormous blasphemies.” Pike, page 266

This is a summary of a portion of their belief system per Wikipedia:

“Based on their understanding of scriptures such as Revelation 14:1-4, Jehovah’s Witnesses believe that exactly 144,000 faithful Christians go to heaven to rule with Christ in the kingdom of God. They, with Jesus, will also perform priestly duties that will bring faithful mankind to perfect health and ‘everlasting life’.^[14] They believe that most of those are already in heaven, and that the “remnant” at Revelation 12:17 (KJV) refers to those remaining alive on earth who will be immediately resurrected to heaven when they die. The Witnesses understand Jesus’ words at John 3:3—”except a man be born again, he cannot see the kingdom of God”—to apply to the 144,000 who are “born again” as “anointed” sons of God in heaven.^[15] They teach that the New Testament, which they refer to as the Christian Greek Scriptures, is primarily directed to the 144,000, and by extension, to those associated with them.^[16] They believe that the terms “Israel of God” (Galatians 6:16), “little flock” (Luke 12:32), “New Jerusalem,” and “the bride, the Lamb’s wife” (Revelation 21:2,9) in the New Testament also refer to the same group of “anointed” Christians.^[17][18][19]

Jehovah’s Witnesses believe that being ‘anointed’ involves a personal revelation by God’s spirit which “gives positive assurance of adoption” to the individual alone.^[20] Members who claim to be anointed are not given special treatment by other congregation members.^[21] However, only those in the anointed class partake of the unleavened bread and wine at the yearly commemoration of Christ’s death, or Memorial.”
https://en.wikipedia.org/wiki/Jehovah%27s_Witnesses_and_salvation

Unfortunately, what they are misinterpreting is the hidden meaning behind the numbers. They were never meant to mean that literally 144,000 people would be chosen and saved.

The number 9 in mysticism, of which the Bible (especially Revelation) is rampant with, is symbolic of consciousness, higher or lower.

Once you have that information, you can begin to decode scripture to find the hidden meaning.

Adding up the digits until you come up with a single digit is the key. So 1+4+4+0+0+0=9, which is consciousness in mysticism.

The Bible is heavily coded with numerology, and this is only one of many examples.

So, the ones that are “saved,” (and “saved” here means the ones that have learned to rise above the lower mind or lower emotions) are the ones that have learned to do exactly that. It all happens during meditation when you enter a higher state of consciousness. It’s not an actual number, but a reference to those that discover the hidden meaning and apply it properly.