2606
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 3912
- Proper Divisor Sum (Aliquot Sum)
- 1306
- 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
- 1302
- Möbius Function
- 1
- Radical
- 2606
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
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
- 102
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- Number of polyhedra (or 3-connected simple planar graphs) with n nodes.at n=8A000944
- Number of equivalence classes of binary sequences of primitive period n.at n=17A002730
- a(n) = ceiling(n*phi^13), where phi is the golden ratio, A001622.at n=5A004968
- Length of n-th term in Look and Say sequences A005150 and A007651.at n=27A005341
- Hoggatt sequence with parameter d=5.at n=5A005363
- Oscillates under partition transform.at n=35A007211
- Coordination sequence T4 for Zeolite Code EMT.at n=42A008089
- Coordination sequence T4 for Zeolite Code MOR.at n=33A008185
- If a, b in sequence, so is ab+5.at n=35A009304
- Coordination sequence T2 for Zeolite Code VET.at n=31A009903
- Coordination sequence T2 for Zeolite Code WEI.at n=36A009918
- Coordination sequence for FeS2-Marcasite, Fe position.at n=25A009955
- Expansion of 1/(1-x^8-x^9-x^10-x^11-x^12-x^13-x^14-x^15-x^16).at n=53A017874
- Numbers k such that the continued fraction for sqrt(k) has period 40.at n=12A020379
- Expansion of g.f. 1/((1 - x)*(1 - 3*x)*(1 - 7*x)*(1 - 8*x)).at n=3A021544
- Length of n-th term of A022482.at n=25A022483
- a(n) = F(n+2) + c(n) where F(k) is k-th Fibonacci number and c(n) is n-th number that is 1 or is a non-Fibonacci number.at n=15A022800
- a(n) = b(n) + d(n), where b(n) = (n-th Fibonacci number > 2) and d(n) = (n-th non-Fibonacci number).at n=14A023486
- a(n) = b(n) + d(n), where b(n) = (n-th Fibonacci number > 1) and d(n) = (n-th non-Lucas number).at n=15A023491
- Coordination sequence T3 for Zeolite Code ITE.at n=35A027371