12078
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 29016
- Proper Divisor Sum (Aliquot Sum)
- 16938
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 3600
- Möbius Function
- 0
- Radical
- 4026
- Omega Function (Ω)
- 5
- 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
- 68
- 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
- Numbers k such that 7*2^k + 3 is prime.at n=16A058592
- Number of length 3 walks on an n-dimensional hypercubic lattice starting at the origin and staying in the nonnegative part.at n=22A064043
- a(1)=0; for i>=1, a(i+1)=position of first occurrence of a(i) in decimal expansion of e.at n=7A098266
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.at n=9A149824
- a(n) = 25*n^2 - n.at n=21A157514
- a(n) = 100*n^2 - 2*n.at n=11A158129
- Numbers n with property that 4 n^2 are squares arising in A158470.at n=28A158517
- a(n) = 484*n^2 - 22.at n=4A158627
- Expansion of 1/((1-x)^5*(x^3+x^2+x+1)^2).at n=41A189376
- Number of strings of length n in {2,3}* for which at least one of tail(2 S) > tail(S) and tail(3 S) > tail(S) holds.at n=28A217437
- Sum of x*y^2*z^3 for positive integers x,y,z with x + y + z = n.at n=8A241205
- Sum of numbers in the n-th antidiagonal of the reciprocity array of 2.at n=36A259580
- Indices i in A112058 where records of 17*i - 3*A112058(i)/8 occur.at n=19A298991
- Numbers k such that R(k) + 10^floor(k/2-1) is prime, where R(k) = (10^k-1)/9 (repunit: A002275).at n=12A331860
- Number of geometry-minimal periodic tilings of the Euclidean plane with Dress-complexity n.at n=15A335696
- Sums of the ascending diagonals of the triangle A162609.at n=53A351704
- Primitive terms of A359565: terms of A359565 with no proper divisor in A359565.at n=31A359566
- Two-Catalan Triangle read by rows, for n>=0 and k>=0.at n=40A380912