Arcana Coelestia #860
860. From these considerations it also becomes clear that all regeneration advances from evening to morning, as is mentioned six times in Genesis 1 where the regeneration of man is the subject. Here the evening is described in verses 2-3, the morning in verses 4-5. The present verse describes the first ray of light or the morning of this state as 'the tops of the mountains appearing'.
Arcana Coelestia #3252
3252. 'A hundred and seventy-five years' means the things constituting that state. This becomes clear from the fact that every number used in the Word means some real thing, see 482, 487, 575, 647, 648, 1963, 1988, 2075, 2252, and so with this particular number which consequently means the things which constitute the state that is the subject here. As long as the mind confines itself to the historical sense it seems as though numbers, such as these 1 which give Abraham's age, do not hold any interior meaning within them. The fact that they do nevertheless hold such meaning within them is evident from all that has been shown already concerning numbers, and becomes clear from the consideration that no number as to its numerical value contains anything holy, and yet the smallest detail of all in the Word is holy.
Footnotes:
1. i.e. the numbers 100, 70, and 5