1308
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
- 12
- Divisor Sum
- 3080
- Proper Divisor Sum (Aliquot Sum)
- 1772
- 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
- 432
- Möbius Function
- 0
- Radical
- 654
- 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
- 145
- 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
- Self-convolution of Fibonacci numbers.at n=13A001629
- Narayana-Zidek-Capell numbers: a(n) = 1 for n <= 2. Otherwise a(2n) = 2a(2n-1), a(2n+1) = 2a(2n) - a(n).at n=13A002083
- High temperature series for spin-1/2 Ising surface susceptibility on planar hexagonal lattice.at n=3A003488
- Cald's sequence: a(n+1) = a(n) - prime(n) if that value is positive and new, otherwise a(n) + prime(n) if new, otherwise 0; start with a(1)=1.at n=122A006509
- Coordination sequence T2 for Zeolite Code MAZ.at n=25A008145
- Coordination sequence T1 for Zeolite Code MFI.at n=23A008161
- Number of 3 X 3 symmetric stochastic matrices under row and column permutations.at n=42A008764
- Expansion of tanh(sin(log(1+x))).at n=7A009790
- Coordination sequence T1 for Zeolite Code RTH.at n=25A009893
- a(n) = Sum_{i,j,k in Z and i^2 + j^2 + k^2 <= n} i^2 + j^2 + k^2.at n=12A014203
- a(n) = Fibonacci(n) - n^2.at n=17A014283
- a(n) = a(n-1) + a(n-2) + 1 for n>1, a(0)=0, a(1)=4.at n=13A022309
- a(n) = (n+2)!(1/3 - 1/4 + ... + c/(n+2)), where c=(-1)^(n+1).at n=4A024176
- [ Sum (s(j) - s(i))^3 ], 1 <= i < j <= n, where s(k) = 1 + 1/2 + ... + 1/k.at n=32A025217
- Number of positive integers that are not the sum of distinct n-th-order polygonal numbers.at n=17A025524
- a(n) = sum of the numbers between the two n's in A026350.at n=33A026353
- Golc sequence in base 6. Left to right concatenation of n,int(log_6(n)),int(log_6(int(log_6(n)))),... in base6.at n=35A028436
- Theta series of 6-dimensional perfect lattice P6.6 = A6,1.at n=16A029695
- Least term in period of continued fraction for sqrt(n) is 6.at n=12A031430
- Coordination sequence T4 for Zeolite Code CFI.at n=24A033602