# 1205

## 1,205 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1205 look like?

This visualization shows the relationship between its 2 prime factors (large circles) and 4 divisors.

1205 is an odd composite number. It is composed of two distinct prime numbers multiplied together. It has a total of four divisors.

## Prime factorization of 1205:

### 5 × 241

See below for interesting mathematical facts about the number 1205 from the Numbermatics database.

### Names of 1205

• Cardinal: 1205 can be written as One thousand, two hundred five.

### Scientific notation

• Scientific notation: 1.205 × 103

### Factors of 1205

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 246

### Divisors of 1205

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 1452
• Sum of proper divisors (its aliquot sum) s(n): 247
• 1205 is a deficient number, because the sum of its proper divisors (247) is less than itself. Its deficiency is 958

### Bases of 1205

• Binary: 100101101012
• Base-36: XH

### Squares and roots of 1205

• 1205 squared (12052) is 1452025
• 1205 cubed (12053) is 1749690125
• The square root of 1205 is 34.7131099155
• The cube root of 1205 is 10.6413243871

### Scales and comparisons

How big is 1205?
• 1,205 seconds is equal to 20 minutes, 5 seconds.
• To count from 1 to 1,205 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 1205 cubic inches would be around 0.9 feet tall.

### Recreational maths with 1205

• 1205 backwards is 5021
• The number of decimal digits it has is: 4
• The sum of 1205's digits is 8
• More coming soon!