The number 45 symbolizes preservation, grace, and God's faithfulness to His promises, linked to Abraham's intercession for Sodom and Caleb's testimony of God's faithfulness.
In Genesis 18:28, Abraham asks God to spare Sodom if there are 45 righteous people there. This intercession links the number with God's mercy and willingness to spare many for the sake of the righteous. In Joshua 14:10, Caleb testifies that it has been 45 years since the Lord spoke His promise to Moses, and that God has kept him alive throughout this entire period. Here, the number is connected to God's faithfulness and fulfillment of promises over a long time. The number 45 also appears in 1 Kings 7:3 in the description of Solomon's palace construction—the House of the Forest of Lebanon—where 45 side chambers rested on pillars, fifteen in each of three rows, testifying to order and symmetry in this royal building project. The number 45 can be interpreted as a combination of 40 (testing and purification) and 5 (grace), resulting in a composite symbolism of grace after testing. This interpretation is not explicitly biblical but occurs in interpretive traditions. In Jewish tradition, the number 45 holds limited independent mystical significance compared to more prominent numbers like 7, 12, or 40, but it appears in gematria interpretations within Kabbalistic contexts. For example, the Hebrew word מה (mah, 'what') has a numerical value of 45, and this word plays a role in Kabbalistic meditation on God's nature. Caleb's 45 years (Joshua 14:10) are counted from when the spies were sent out into the wilderness until the land was distributed after its conquest. Caleb was 40 years old when he was sent as a spy and 85 when he received his inheritance—a testimony to physical and spiritual endurance through God's power.*