1884
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 21
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 4424
- Proper Divisor Sum (Aliquot Sum)
- 2540
- 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
- 624
- Möbius Function
- 0
- Radical
- 942
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 130
- 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 partitions into non-integral powers.at n=13A000158
- Numbers k such that 5*2^k - 1 is prime.at n=22A001770
- Number of spanning trees with degrees 1 and 3 in D_4 X P_n.at n=5A003762
- Coordination sequence T1 for Zeolite Code BOG.at n=31A008049
- Coordination sequence T1 for Cordierite.at n=26A008251
- Year of birth of n-th President of U.S.A.at n=32A008745
- a(n) is nonsquarefree and is sum of first k nonsquarefrees for some k.at n=16A013935
- Number of lines through exactly 5 points of an n X n grid of points.at n=29A018812
- Coordination sequence T4 for Zeolite Code CGF.at n=30A019454
- Place where n-th 1 occurs in A023129.at n=47A022791
- Coordination sequence T6 for Zeolite Code MWW.at n=29A024991
- a(n) = n^3 + n^2 + n.at n=12A027444
- Molien series for Hecke group H_{3,4}.at n=14A027631
- Positions of record values in A030747.at n=40A030752
- 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 28.at n=18A031526
- Expansion of Product_{k>=1} (1 + 3*x^k).at n=17A032308
- Sums of distinct powers of 12.at n=14A033048
- Position of first occurrence of n in the continued fraction for the Euler-Mascheroni constant (gamma).at n=43A033149
- Coordination sequence T2 for Zeolite Code SBE.at n=35A033605
- Fractional part of square root of a(n) starts with 4: first term of runs.at n=42A034110