9867
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 30
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 16128
- Proper Divisor Sum (Aliquot Sum)
- 6261
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5280
- Möbius Function
- 1
- Radical
- 9867
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
Special
- Factorial
- no
- Catalan Number
- no
- Bell Number
- no
- Motzkin Number
- no
- Primorial
- no
Figurate Numbers
- Fibonacci Number
- no
- Triangular Number
- no
- Perfect Square
- no
- Perfect Cube
- no
- Pentagonal Number
- no
- Hexagonal Number
- no
- Lucas Number
- no
- Tetrahedral Number
- no
- Pell Number
- no
- Tribonacci Number
- no
- Pronic Number
- no
Recreational
- Happy Number
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 73
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- no
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- a(n) = n*(13*n - 1)/2.at n=39A022270
- Odd elements in 4-Pascal triangle A028275 (by row) that are not 1.at n=43A028278
- Odd elements in 4-Pascal triangle A028275 (by row) that are not 1.at n=42A028278
- Distinct elements in 4-Pascal triangle A028275 (by row).at n=53A028280
- Distinct odd elements in 4-Pascal triangle A028275 (by row).at n=25A028281
- Elements to right of central elements in 4-Pascal triangle A028275.at n=56A028284
- Elements to right of central elements in 4-Pascal triangle A028275 that are not 1.at n=42A028285
- Odd elements (greater than 1) to right of central elements in 4-Pascal triangle A028275.at n=18A028287
- Odd numbers in the (1,2)-Pascal triangle A029635 that are different from 1.at n=46A029639
- Distinct odd numbers in the (1,2)-Pascal triangle A029635.at n=37A029642
- Numbers to the right of the central elements of the (1,2)-Pascal triangle A029635.at n=56A029648
- Numbers to the right of the central elements of the (1,2)-Pascal triangle A029635 that are different from 2.at n=42A029649
- Odd numbers to the right of the central elements of the (1,2)-Pascal triangle A029635.at n=25A029650
- Odd numbers in the (1,2)-Pascal triangle A029635.at n=61A029652
- Odd numbers in (2,1)-Pascal triangle A029653 that are different from 1.at n=46A029657
- Distinct odd numbers in (2,1)-Pascal triangle A029653.at n=37A029660
- Odd numbers to the left of the central elements of the (2,1)-Pascal triangle A029653.at n=28A029664
- Numbers to the left of the central elements of the (2,1)-Pascal triangle A029653 that are different from 2.at n=48A029667
- Odd numbers in the (2,1)-Pascal triangle A029653.at n=61A029669
- "DHK" (bracelet, identity, unlabeled) transform of 1,2,3,4,...at n=13A032254