2073
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
- 4
- Divisor Sum
- 2768
- Proper Divisor Sum (Aliquot Sum)
- 695
- 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
- 1380
- Möbius Function
- 1
- Radical
- 2073
- Omega Function (Ω)
- 2
- Little Omega Function (ω)
- 2
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
- 37
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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
- no
- Odd
- yes
Appears in sequences
- Genocchi numbers (of first kind); unsigned coefficients give expansion of x*tan(x/2).at n=5A001469
- Triangle of coefficients of Euler polynomials E_2n(x) (exponents in increasing order).at n=37A004172
- Triangle of coefficients of Euler polynomials E_2n(x) (exponents in decreasing order).at n=47A004173
- a(n) = F(n+2) - 2^[ (n+1)/2 ] - 2^[ n/2 ] + 1.at n=16A005673
- Number of strict 3rd-order maximal independent sets in cycle graph.at n=35A007392
- Coordination sequence T1 for Zeolite Code AEL.at n=30A008004
- Coordination sequence T2 for Zeolite Code AEL.at n=30A008005
- Coordination sequence T2 for Zeolite Code AFS.at n=35A008024
- Coordination sequence T2 for Zeolite Code BPH.at n=35A008056
- Coordination sequence T2 for Zeolite Code PHI.at n=33A008228
- Coordination sequence T4 for Zeolite Code CON.at n=32A009871
- Coordination sequence T4 for Zeolite Code RUT.at n=30A009900
- Triangle of numbers associated with Genocchi numbers.at n=34A014780
- Triangle of numbers associated with Genocchi numbers.at n=26A014780
- Triangle of numbers associated with Genocchi numbers.at n=35A014780
- Triangle of numbers associated with Genocchi numbers.at n=25A014780
- Seidel's triangle, read by rows.at n=35A014781
- Seidel's triangle, read by rows.at n=41A014781
- Seidel's triangle, read by rows.at n=34A014781
- Triangle of numbers associated with Genocchi numbers.at n=18A014782