# 1345

## 1,345 is an odd composite number composed of two prime numbers multiplied together.

What does the number 1345 look like?

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

1345 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 1345:

### 5 × 269

See below for interesting mathematical facts about the number 1345 from the Numbermatics database.

### Names of 1345

• Cardinal: 1345 can be written as One thousand, three hundred forty-five.

### Scientific notation

• Scientific notation: 1.345 × 103

### Factors of 1345

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 274

### Divisors of 1345

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 1620
• Sum of proper divisors (its aliquot sum) s(n): 275
• 1345 is a deficient number, because the sum of its proper divisors (275) is less than itself. Its deficiency is 1070

### Bases of 1345

• Binary: 101010000012
• Base-36: 11D

### Squares and roots of 1345

• 1345 squared (13452) is 1809025
• 1345 cubed (13453) is 2433138625
• The square root of 1345 is 36.6742416419
• The cube root of 1345 is 11.0384330549

### Scales and comparisons

How big is 1345?
• 1,345 seconds is equal to 22 minutes, 25 seconds.
• To count from 1 to 1,345 would take you about twenty-two 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 1345 cubic inches would be around 0.9 feet tall.

### Recreational maths with 1345

• 1345 backwards is 5431
• The number of decimal digits it has is: 4
• The sum of 1345's digits is 13
• More coming soon!