9450
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 48
- Divisor Sum
- 29760
- Proper Divisor Sum (Aliquot Sum)
- 20310
- 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
- 2160
- Möbius Function
- 0
- Radical
- 210
- Omega Function (Ω)
- 7
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 60
- 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
- S2(j,2j+2) where S2(n,k) is a 2-associated Stirling number of the second kind.at n=3A000497
- Unsigned Stirling numbers of the first kind s(n,7).at n=3A001234
- Stirling numbers of first kind, s(n+3, n), negated.at n=6A001303
- Denominators of zeta(2*n)/Pi^(2*n).at n=4A002432
- Number of n-step walks on square lattice in the first quadrant which finish at distance n-3 from the x-axis.at n=24A005564
- Poincaré series [or Poincare series] of Lie algebra associated with a certain braid group.at n=13A007990
- Triangle T(n,k) of associated Stirling numbers of second kind, n >= 2, 1 <= k <= floor(n/2).at n=23A008299
- Coordination sequence for alpha-Nd, Position Nd1.at n=30A009948
- Number of singular 2 X 2 matrices over Z(n) (i.e., with determinant = 0).at n=17A020478
- a(n) = n*(n^2 + 12*n - 25)/6.at n=35A026057
- Expansion of 1/((1-3x)(1-6x)(1-9x)(1-12x)).at n=3A028085
- Numbers k such that 19*2^k+1 is prime.at n=11A032359
- Expansion of e.g.f.: -(log(1-x))^3*x.at n=7A052758
- Number of ways of placing n labeled balls into 4 indistinguishable boxes with at least 2 balls in each box.at n=2A058844
- Number of rods required to make a 3-D cube of side length n.at n=14A059986
- Triangle of coefficients of Bessel polynomials {y_n(x)}'.at n=23A065931
- Triangle of coefficients of Bessel polynomials {y_n(x)}''.at n=17A065943
- Least m such that n = m mod tau(m) if such m exists, otherwise 0.at n=41A066708
- Triangular table of coefficients of the Hermite polynomials, divided by 2^floor(n/2).at n=57A067613
- Number of conjugacy classes in the symmetric group S_n with distinct cardinality.at n=38A073906