# 1261

## 1,261 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1261 look like?

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

1261 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 1261:

### 13 × 97

See below for interesting mathematical facts about the number 1261 from the Numbermatics database.

### Names of 1261

• Cardinal: 1261 can be written as One thousand, two hundred sixty-one.

### Scientific notation

• Scientific notation: 1.261 × 103

### Factors of 1261

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 110

### Divisors of 1261

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 1372
• Sum of proper divisors (its aliquot sum) s(n): 111
• 1261 is a deficient number, because the sum of its proper divisors (111) is less than itself. Its deficiency is 1150

### Bases of 1261

• Binary: 100111011012
• Base-36: Z1

### Squares and roots of 1261

• 1261 squared (12612) is 1590121
• 1261 cubed (12613) is 2005142581
• The square root of 1261 is 35.5105618089
• The cube root of 1261 is 10.8036795875

### Scales and comparisons

How big is 1261?
• 1,261 seconds is equal to 21 minutes, 1 second.
• To count from 1 to 1,261 would take you about twenty-one 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 1261 cubic inches would be around 0.9 feet tall.

### Recreational maths with 1261

• 1261 backwards is 1621
• The number of decimal digits it has is: 4
• The sum of 1261's digits is 10
• More coming soon!