# 121920

## 121,920 is an even composite number composed of four prime numbers multiplied together.

What does the number 121920 look like?

This visualization shows the relationship between its 4 prime factors (large circles) and 56 divisors.

121920 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of fifty-six divisors.

## Prime factorization of 121920:

### 26 × 3 × 5 × 127

(2 × 2 × 2 × 2 × 2 × 2 × 3 × 5 × 127)

See below for interesting mathematical facts about the number 121920 from the Numbermatics database.

### Names of 121920

• Cardinal: 121920 can be written as One hundred twenty-one thousand, nine hundred twenty.

### Scientific notation

• Scientific notation: 1.2192 × 105

### Factors of 121920

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 137

### Divisors of 121920

• Number of divisors d(n): 56
• Complete list of divisors:
• Sum of all divisors σ(n): 390144
• Sum of proper divisors (its aliquot sum) s(n): 268224
• 121920 is an abundant number, because the sum of its proper divisors (268224) is greater than itself. Its abundance is 146304

### Bases of 121920

• Binary: 111011100010000002
• Base-36: 2M2O

### Squares and roots of 121920

• 121920 squared (1219202) is 14864486400
• 121920 cubed (1219203) is 1812278181888000
• The square root of 121920 is 349.1704454847
• The cube root of 121920 is 49.5859134469

### Scales and comparisons

How big is 121920?
• 121,920 seconds is equal to 1 day, 9 hours, 52 minutes.
• To count from 1 to 121,920 would take you about nine hours.

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 121920 cubic inches would be around 4.1 feet tall.

### Recreational maths with 121920

• 121920 backwards is 029121
• 121920 is a Harshad number.
• The number of decimal digits it has is: 6
• The sum of 121920's digits is 15
• More coming soon!