1962
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
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 4290
- Proper Divisor Sum (Aliquot Sum)
- 2328
- 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
- 648
- Möbius Function
- 0
- Radical
- 654
- Omega Function (Ω)
- 4
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 24
- Smith Number
- yes
- 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
- Number of monosubstituted alkanes C(n)H(2n+1)-X of the form shown in the Comments lines that are stereoisomers.at n=11A000623
- Number of weighted voting procedures.at n=11A005257
- Second pentagonal numbers: a(n) = n*(3*n + 1)/2.at n=36A005449
- 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=14A005901
- Numbers n such that n^32 + 1 is prime.at n=38A006315
- Number of non-Abelian metacyclic groups of order 2^n.at n=40A007982
- Coordination sequence T3 for Zeolite Code DOH.at n=27A008080
- Coordination sequence T1 for Zeolite Code LTA and RHO.at n=35A008137
- Coordination sequence T4 for Zeolite Code STI.at n=30A008237
- Coordination sequence for diamond.at n=28A008253
- Coordination sequence for CaF2(2), Ca position.at n=28A009926
- a(0) = 1, a(n) = 40*n^2 + 2 for n>0.at n=7A010022
- Largest value of k for which Golay-Rudin-Shapiro sequence A020986(k) = n.at n=48A020991
- Coordination sequence for root lattice B_3.at n=10A022145
- Position of 2^n among the powers of primes (A000961).at n=14A024622
- Positions of squares among the powers of primes (A000961).at n=44A024626
- a(n) = sum of the numbers between the two n's in A026284.at n=39A026287
- Cube of the lower triangular normalized partition matrix.at n=13A027517
- Second diagonal of A027517.at n=3A027523
- Numbers of the form m*(6*m-1) and m*(6*m+1), where m is an integer.at n=36A036498