1554
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 16
- Divisor Sum
- 3648
- Proper Divisor Sum (Aliquot Sum)
- 2094
- 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
- 1
- Radical
- 1554
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 4
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
- 34
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Convolved Fibonacci numbers.at n=5A001875
- Representation degeneracies for Neveu-Schwarz strings.at n=15A005296
- Coefficient of x^6 in expansion of (1+x+x^2)^n.at n=6A005714
- Number of factors in the infinite word formed by the Kolakoski sequence A000002.at n=43A007782
- Coordination sequence T2 for Zeolite Code AEL.at n=26A008005
- Coordination sequence T2 for Zeolite Code GOO.at n=27A008112
- Coordination sequence T3 for Zeolite Code GOO.at n=27A008113
- Coordination sequence T4 for Zeolite Code GOO.at n=27A008114
- Coordination sequence T5 for Zeolite Code DFO.at n=30A009879
- Coordination sequence T3 for Zeolite Code RUT.at n=26A009899
- Coordination sequence for MgNi2, Position Ni1.at n=10A009933
- a(n) = floor(n*(n-1)*(n-2)/30).at n=37A011912
- Form array in which n-th row is obtained by expanding (1+x+x^2)^n and taking the 3rd column from the center.at n=6A014532
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite DDR = Deca-dodecasil 3R[Si120O240]qR starting with a T5 atom.at n=10A019112
- a(n) = Sum_{k >= 1} floor(3*tau^(n-k)).at n=11A020958
- a(n) = n*(7*n + 1)/2.at n=21A022265
- Convolution of odd numbers and A014306.at n=42A023661
- Position of n^3 + (n+1)^3 in A003325.at n=46A024669
- a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ...+ a(n-1)*a(1) for n >= 5, with initial values 0,0,1,1.at n=21A025277
- Index of 10^n within the sequence of the numbers of the form 8^i*10^j.at n=52A025746