5546
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 8640
- Proper Divisor Sum (Aliquot Sum)
- 3094
- 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
- 2668
- Möbius Function
- -1
- Radical
- 5546
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 36
- 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
- yes
- Odd
- no
Appears in sequences
- Coordination sequence T1 for Zeolite Code MEP.at n=44A008157
- Coordination sequence T4 for Zeolite Code VET.at n=45A009905
- Coordination sequence for CaF2(1), F position.at n=25A009924
- a(1)=1, a(n) = 17*a(n-1) + n.at n=3A014900
- Number of similarity classes of triangles which can be drawn using the lattice points in an n X n grid for vertices.at n=14A028492
- "AFJ" (ordered, size, labeled) transform of 2,2,2,2,...at n=7A032000
- a(n) = ceiling((n + 7/10)^3).at n=16A034133
- Numbers whose base-2 representation has exactly 12 runs.at n=10A043579
- Numbers whose base-4 representation contains exactly three 1's and four 2's.at n=0A045104
- Starting from generation 5 add previous and next term yielding generation 6.at n=39A048452
- Numbers k such that A000010(k) divides A074639(k).at n=39A074645
- a(n) = 3*n^2 - 1.at n=42A080663
- Diagonal of A083167.at n=47A083168
- Numbers n occurring in binary representation of n*(n+1)/2.at n=34A092734
- Triangle read by rows: T(n,k) is number of Grand Motzkin paths of length n having k (1,0)-steps at level zero. (A Grand Motzkin path is a path in the half-plane x>=0, starting at (0,0), ending at (n,0) and consisting of steps u=(1,1), d=(1,-1) and h=(1,0).).at n=68A109189
- Let M be the matrix defined in A111490. Sequence gives M(2,1)-M(1,2), M(2,1)+M(3,1)+M(3,2)-M(1,2)-M(1,3)-M(2,3), etc.at n=36A123329
- Integral quotients of products of consecutive composites divided by their sums: sums (divisors).at n=18A141091
- Alternating row sums of triangle A049029 (S2(5)).at n=4A145561
- Number of ways to partition 1 into distinct reduced fractions i/j with j <= n.at n=21A154888
- a(0) = -1, otherwise a(n) = (-1)^n*(n^3 - 15*n^2 + 2*n - 12)/6.at n=38A173248