4194
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 9126
- Proper Divisor Sum (Aliquot Sum)
- 4932
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1392
- Möbius Function
- 0
- Radical
- 1398
- Omega Function (Ω)
- 4
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 64
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Number of walks on cubic lattice (starting from origin and not going below xy plane).at n=5A005573
- Poincaré series [or Poincare series] of Lie algebra associated with a certain braid group.at n=11A007990
- Coordination sequence T2 for Cordierite.at n=39A008252
- Coordination sequence for D_9 lattice.at n=2A008376
- Fibonacci sequence beginning 0, 18.at n=13A022352
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 64.at n=8A031562
- Coordination sequence T1 for Zeolite Code ESV.at n=43A038409
- Numbers whose base-8 representation has exactly 5 runs.at n=23A043627
- Handsome numbers (A007532) representable as a sum of any positive powers of their digits in two distinct ways, not counting different powers of duplicated digits as distinct.at n=31A050240
- Positive numbers whose product of digits is 8 times their sum.at n=37A062040
- Numbers k such that the k-th term of the EKG sequence (A064413(k)) has more than one controlling prime.at n=17A073735
- Numbers n such that sopf(n) = sopf(n+1) - sopf(n-1), where sopf(x) = sum of the distinct prime factors of x.at n=6A076525
- Numbers n such that N(n+1) - N(n) sets a new record, where N(n) = A005349.at n=13A082517
- Initial values for iteration of the function f(x) = A063919(x) such that the iteration ends in a 14-cycle, i.e., in A097030.at n=35A097034
- Square array T(n,k) read by antidiagonals: coordination sequence for lattice D_n.at n=30A103903
- Expansion of 1/((x-1)*(x+1)*(x^2+x+1)*(x^2+x-1)*(x^2-x+1)*(x^2+1)*(x^4-x^2+1)).at n=18A109609
- Diameters in miles of the planets in the solar system, starting with the closest to the sun.at n=3A118652
- (1/8)*number of lattice points with odd indices in a cubic lattice inside a sphere around the origin with radius 2*n.at n=19A120884
- Connell (5,3)-sum sequence (partial sums of the (5,3)-Connell sequence).at n=43A122795
- Maximum number of unit squares aligned with unit-spaced horizontal lines that can be enclosed by a circle of radius n.at n=37A124484