45 (forty-five) is the natural number following 44 and preceding 46. 45 is an odd number and a Størmer number, as well as the 9th triangular number [1] and 5th hexagonal number. [2] 45 degrees is half of a right angle.

Feb 11, 2020 · In honor of my 45th birthday, here are 45 fun facts about the number 45: 45 is the natural number following 44 and preceding 46. 45 is an odd number. 45 is a triangular number. 45 is a hexagonal number. 45 is a hexadecagonal number. 45 is a Størmer number. 45 is a Kaprekar number. 45 is a Harshad number.

45 (forty-five) is a number. It comes between forty-four and forty-six, and is an odd number. It is divisible by 1, 3, 5, 9, 15, and 45.

Jan 7, 2013 · In chemistry 45 is the atomic number of rhodium. In football (soccer), each half is made up of 45 minutes. Here are some math facts about the number 45: The number 45 is an odd number. The number 45 has 6 factors which are 1,3,5,9,15 and 45. Two are these factors are prime factors which are 3 and 5.

Number 45 is a triangular number with n=9 and a hexagonal number with n=5. Binary numeral for number 45 is 101101. Octal numeral is 55. Duodecimal value is 39. Hexadecimal representation is 2d. Square of the number 45 is 2025. Square root of the number 45 is 6.7082039324994.

45 (number) 45 is an odd two-digits composite number following 44 and preceding 46. In scientific notation, it is written as 4.5 × 10 1. The sum of its digits is 9. It has a total of 3 prime factors and 6 positive divisors. There are 24 positive integers (up to 45) that are relatively prime to 45. Properties; Name; Notation

The number 45 is a triangular number, meaning it can be represented as a triangle with equal sides, specifically, a triangle with 9 dots on each side. It is also a semi-perfect number, as it can be expressed as the sum of its divisors, excluding itself (1+3+5+9+15).

45 (forty-five) is the natural number following 44 and preceding 46. Quick Facts ← 44 45 46 →, Cardinal ... Forty-five is the smallest odd number that has more divisors than , and that has a larger sum of divisors than .

Your guide to the number 45, an odd composite number composed of two distinct primes. Mathematical info, prime factorization, fun facts and numerical data for STEM, education and fun.

A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. We do not consider 45 as a prime number, because it can be written as a product of two smaller natural numbers (check the factors of number 45 below).