1442
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 2496
- Proper Divisor Sum (Aliquot Sum)
- 1054
- 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
- 612
- Möbius Function
- -1
- Radical
- 1442
- 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
- 47
- 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
- Number of atoms in a decahedron with n shells.at n=12A004068
- Number of points on surface of cuboctahedron (or icosahedron): a(0) = 1; for n > 0, a(n) = 10n^2 + 2. Also coordination sequence for f.c.c. or A_3 or D_3 lattice.at n=12A005901
- Coordination sequence T2 for Zeolite Code AFO.at n=25A008016
- Coordination sequence T4 for Zeolite Code BOG.at n=27A008052
- Coordination sequence T2 for Zeolite Code LAU.at n=27A008125
- Coordination sequence T1 for Zeolite Code LTA and RHO.at n=30A008137
- Coordination sequence T5 for Zeolite Code NON.at n=23A008216
- Coordination sequence for diamond.at n=24A008253
- a(n) = n^2 - 2.at n=37A008865
- Coordination sequence for CaF2(2), Ca position.at n=24A009926
- a(0) = 1, a(n) = 40*n^2 + 2 for n>0.at n=6A010022
- Number of parts in all partitions of n into distinct parts.at n=30A015723
- Numbers k such that phi(k) + 12 | sigma(k).at n=40A015805
- Numbers k such that sigma(k) = sigma(k+7).at n=8A015867
- a(n) is the concatenation of n and 3n.at n=13A019551
- Expansion of 1/((1-x)(1-4x)(1-5x)(1-6x)).at n=3A021744
- Index of 9^n within the sequence of the numbers of the form 9^i*10^j.at n=54A025739
- Triangle T read by rows: differences of Motzkin triangle (A026300).at n=71A026105
- T(n,[ n/2 ]), where T is the array defined in A026105.at n=11A026117
- Numbers whose square with its last digit deleted is also a square.at n=16A031149