2954
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 5088
- Proper Divisor Sum (Aliquot Sum)
- 2134
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 1260
- Möbius Function
- -1
- Radical
- 2954
- Omega Function (Ω)
- 3
- 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
- 22
- 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
- a(n) = (n+2)*2^(2*n-1) - (n/2)*binomial(2*n,n).at n=5A003583
- Coordination sequence T1 for Zeolite Code CAS.at n=33A008063
- Coordination sequence T2 for Zeolite Code STI.at n=37A008235
- Expansion of e.g.f. cosh(exp(x)*x).at n=7A009121
- Coordination sequence for Cr3Si, Si position.at n=14A009927
- a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-1)*a(1) for n >= 4.at n=11A025266
- a(n) = (d(n)-r(n))/2, where d = A026066 and r is the periodic sequence with fundamental period (1,0,0,0).at n=21A026067
- T(4n,n), where T is the array in A026120.at n=4A026130
- a(n) = n^3 + n^2 + n.at n=14A027444
- Numbers k such that Hofstadter Q-sequence Q(k) (A005185) satisfies Q(k) = k/2.at n=42A027619
- Shifts left 2 places under "BGK" (reversible, element, unlabeled) transform.at n=16A032067
- Numbers whose set of base 14 digits is {0,1}.at n=14A033050
- Positive numbers having the same set of digits in base 6 and base 7.at n=42A033170
- Coordination sequence T1 for Zeolite Code TSC.at n=45A033616
- Number of 6-valent trees with n nodes.at n=14A036653
- Number of partitions satisfying (cn(0,5) <= cn(1,5) = cn(4,5)).at n=41A036809
- Coordination sequence T3 for Zeolite Code STT.at n=36A038426
- Numbers n such that string 5,4 occurs in the base 10 representation of n but not of n-1.at n=32A044386
- Numbers n such that string 5,4 occurs in the base 10 representation of n but not of n+1.at n=32A044767
- n*M127 - 1 is prime, where M127 = 2^127 - 1.at n=27A057441