3012
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 6
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 7056
- Proper Divisor Sum (Aliquot Sum)
- 4044
- 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
- 1000
- Möbius Function
- 0
- Radical
- 1506
- 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
- 22
- 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
- Cluster series for f.c.c. lattice.at n=4A003209
- Number of n-edge 3-connected planar maps with a sense-reversing automorphism.at n=20A006445
- Number of strict 3rd-order maximal independent sets in path graph.at n=37A007384
- Coordination sequence T1 for Zeolite Code APC.at n=38A008032
- Coordination sequence T2 for Zeolite Code BOG.at n=39A008050
- Coordination sequence T1 for Zeolite Code EAB.at n=40A008082
- Coordination sequence T3 for Zeolite Code LIO.at n=38A008131
- Number of partitions of n into 10 unordered relatively prime parts.at n=29A023030
- Convolution of natural numbers with (1, p(1), p(2), ... ), where p(k) is the k-th prime.at n=18A023538
- a(n) = Sum_{k=0..floor(n/2)} T(n,k), T given by A026747.at n=11A026755
- a(n) = n-th largest even number in array T given by A027170.at n=43A027183
- Numbers k such that 133*2^k+1 is prime.at n=16A032416
- Every run of digits of n in base 11 has length 2.at n=28A033009
- Numbers whose base-11 expansion has no run of digits with length < 2.at n=40A033024
- Numbers whose base-2 and base-10 expansions have the same digit sum.at n=46A037308
- Positive numbers having the same set of digits in base 4 and base 10.at n=21A037428
- Decimal expansion of a(n) is given by the first n terms of the periodic sequence with initial period 3,0,1,2.at n=3A037764
- Numbers k such that k-th and (k+1)-st term of A038593 differ by 10.at n=41A038641
- Numerators of continued fraction convergents to sqrt(19).at n=7A041028
- Numbers n such that string 1,2 occurs in the base 10 representation of n but not of n-1.at n=33A044344