# 1621

## 1,621 is a prime number. Like all primes greater than two, it is odd and has no factors apart from itself and one.

What does the number 1621 look like?

As a prime, it is not composed of any other numbers and has no internal structure.

1621 is a prime number. Like all primes (except two), it is an odd number.

## Prime factorization of 1621:

### 1621

See below for interesting mathematical facts about the number 1621 from the Numbermatics database.

### Names of 1621

• Cardinal: 1621 can be written as One thousand, six hundred twenty-one.

### Scientific notation

• Scientific notation: 1.621 × 103

### Factors of 1621

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 1621

### Divisors of 1621

• Number of divisors d(n): 2
• Complete list of divisors:
• Sum of all divisors σ(n): 1622
• Sum of proper divisors (its aliquot sum) s(n): 1
• 1621 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 1620

### Bases of 1621

• Binary: 110010101012
• Base-36: 191

### Squares and roots of 1621

• 1621 squared (16212) is 2627641
• 1621 cubed (16213) is 4259406061
• The square root of 1621 is 40.2616442783
• The cube root of 1621 is 11.7470190113

### Scales and comparisons

How big is 1621?
• 1,621 seconds is equal to 27 minutes, 1 second.
• To count from 1 to 1,621 would take you about twenty-seven 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 1621 cubic inches would be around 1 feet tall.

### Recreational maths with 1621

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

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"Number 1621 - Facts about the integer". Numbermatics.com. 2022. Web. 9 August 2022.

APA style:
Numbermatics. (2022). Number 1621 - Facts about the integer. Retrieved 9 August 2022, from https://numbermatics.com/n/1621/

Chicago style:
Numbermatics. 2022. "Number 1621 - Facts about the integer". https://numbermatics.com/n/1621/

The information we have on file for 1621 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!

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