What is the meaning of 4?

The meaning of 4 is that it is a natural number between 3 and 5, and also a positive integer, an even number, a rational number, and a real number.

4 is the smallest composite number of the positive integers, twice the number 2, and a square number.

4 is an Arabic numeral, created in ancient India and later spread to Europe by the Arabs and used worldwide.

Basic properties of 4:

I. An even number, an Arabic numeral.4 is a simple Arabic numeral. The smallest combining number, **** has 3 factors.

II. the first composite number, which has factors 1, 2, and 4.

III. the 4th loss number, with a true approximate sum of 3 and a degree of loss of 1. The previous one is 3, the next is 5.

IV. the 3rd high composite number. The previous one is 2, the next one is 6.

V. 1st semi-prime number. The next one is 6.

VI. 2nd square number that is the square of 2. The previous one is 1, the next one is 9.

VII. 4th decimal hashard number. The first is 3, the next is 5.

VIII. The 3rd full hashard number, that is, the number that is hashard in all systems of progression. The previous one is 2, the next is 6.

IX. The 1st decimal extravagant number. The next one is 6.