2064
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 20
- Divisor Sum
- 5456
- Proper Divisor Sum (Aliquot Sum)
- 3392
- 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
- 672
- Möbius Function
- 0
- Radical
- 258
- Omega Function (Ω)
- 6
- 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
- 125
- 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
- a(n) = (7*n+1)*(7*n+6).at n=6A001526
- 'Eban' numbers (the letter 'e' is banned!).at n=37A006933
- Coordination sequence T2 for Zeolite Code VFI.at n=35A008246
- Coordination sequence T1 for Moganite.at n=29A008258
- Theta series of direct sum of f.c.c. and b.c.c. lattices.at n=40A008664
- E.g.f.: expansion of tanh(log(1+x))/exp(x).at n=8A009782
- Coordination sequence T3 for Zeolite Code CON.at n=32A009870
- Coordination sequence T5 for Zeolite Code RSN.at n=30A009889
- Coordination sequence T1 for Zeolite Code VNI.at n=28A009907
- Specific heat coefficients for square lattice spin 1 Ising model.at n=8A010111
- Numbers k such that phi(k) + 10 | sigma(k).at n=7A015801
- Sums of two distinct powers of 2.at n=59A018900
- Sum of n plus its prime factors associated with A020700.at n=14A020905
- n-th 8k+1 prime plus n-th 8k+7 prime.at n=40A022761
- Vertex-transitive graphs of valency 11 with 2n nodes.at n=6A023638
- Vertex-transitive graphs of valency 12 with n nodes.at n=11A023639
- a(n) = position of n^2 + (n+1)^2 + (n+2)^2 in A000408.at n=27A024802
- Coordination sequence T1 for Zeolite Code ITE.at n=31A027369
- a(n) = n*(n+5).at n=43A028557
- Expansion of (theta_3(z)*theta_3(21z)+theta_2(z)*theta_2(21z))^4.at n=40A028652