# 1245

## 1,245 is an odd composite number composed of three prime numbers multiplied together.

What does the number 1245 look like?

This visualization shows the relationship between its 3 prime factors (large circles) and 8 divisors.

1245 is an odd composite number. It is composed of three distinct prime numbers multiplied together. It has a total of eight divisors.

## Prime factorization of 1245:

### 3 × 5 × 83

See below for interesting mathematical facts about the number 1245 from the Numbermatics database.

### Names of 1245

• Cardinal: 1245 can be written as One thousand, two hundred forty-five.

### Scientific notation

• Scientific notation: 1.245 × 103

### Factors of 1245

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 91

### Divisors of 1245

• Number of divisors d(n): 8
• Complete list of divisors:
• Sum of all divisors σ(n): 2016
• Sum of proper divisors (its aliquot sum) s(n): 771
• 1245 is a deficient number, because the sum of its proper divisors (771) is less than itself. Its deficiency is 474

### Bases of 1245

• Binary: 100110111012
• Base-36: YL

### Squares and roots of 1245

• 1245 squared (12452) is 1550025
• 1245 cubed (12453) is 1929781125
• The square root of 1245 is 35.2845575287
• The cube root of 1245 is 10.7577913591

### Scales and comparisons

How big is 1245?
• 1,245 seconds is equal to 20 minutes, 45 seconds.
• To count from 1 to 1,245 would take you about twenty minutes.

This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 1245 cubic inches would be around 0.9 feet tall.

### Recreational maths with 1245

• 1245 backwards is 5421
• The number of decimal digits it has is: 4
• The sum of 1245's digits is 12
• More coming soon!