# 159821

## 159,821 is an odd composite number composed of two prime numbers multiplied together.

What does the number 159821 look like?

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

159821 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 159821:

### 71 × 2251

See below for interesting mathematical facts about the number 159821 from the Numbermatics database.

### Names of 159821

• Cardinal: 159821 can be written as One hundred fifty-nine thousand, eight hundred twenty-one.

### Scientific notation

• Scientific notation: 1.59821 × 105

### Factors of 159821

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 2322

### Divisors of 159821

• Number of divisors d(n): 4
• Complete list of divisors:
• Sum of all divisors σ(n): 162144
• Sum of proper divisors (its aliquot sum) s(n): 2323
• 159821 is a deficient number, because the sum of its proper divisors (2323) is less than itself. Its deficiency is 157498

### Bases of 159821

• Binary: 1001110000010011012
• Base-36: 3FBH

### Squares and roots of 159821

• 159821 squared (1598212) is 25542752041
• 159821 cubed (1598213) is 4082268173944661
• The square root of 159821 is 399.7761873849
• The cube root of 159821 is 54.2680997461

### Scales and comparisons

How big is 159821?
• 159,821 seconds is equal to 1 day, 20 hours, 23 minutes, 41 seconds.
• To count from 1 to 159,821 would take you about twenty 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 159821 cubic inches would be around 4.5 feet tall.

### Recreational maths with 159821

• 159821 backwards is 128951
• The number of decimal digits it has is: 6
• The sum of 159821's digits is 26
• More coming soon!