6212
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
- 6
- Divisor Sum
- 10878
- Proper Divisor Sum (Aliquot Sum)
- 4666
- 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
- 3104
- Möbius Function
- 0
- Radical
- 3106
- Omega Function (Ω)
- 3
- 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
- 124
- 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
- Coordination sequence T1 for Keatite.at n=44A009844
- Number of lines through exactly 7 points of an n X n grid of points.at n=54A018814
- Every suffix prime and no 0 digits in base 9 (written in base 9).at n=36A024784
- Two-dimensional simplicial complexes on n labeled nodes.at n=4A039718
- Numbers m such that the factorizations of m..m+3 have the same number of primes (including multiplicities).at n=29A045940
- Numbers of the form (10*a + b)^2 + (10*b + a)^2 with a and b less than 10, in numerical order.at n=28A061191
- Numbers n whose sum of divisors and number of divisors are both triangular numbers.at n=23A070996
- a(1)=1; a(n) = a(n-1) + [sum of all decimal digits present so far in the sequence].at n=34A072921
- Maximum number of regions into which the plane is divided by n triangles.at n=46A077588
- Least positive integers, all distinct, that satisfy sum(n>0,1/a(n)^z)=0, where z=(60+I*11)/61.at n=23A084804
- A puzzle: reverse digits of n^2 + 10.at n=46A097990
- A puzzle: reverse digits of n^2 + 10.at n=46A097991
- Slowest increasing sequence beginning with 1 whose digits satisfy the rule d*2.at n=10A102252
- Numbers n such that n, n+1, n+2 and n+3 are products of exactly 3 primes.at n=28A124057
- 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, 0), (-1, 0, 0), (0, 1, -1), (0, 1, 1), (1, -1, 1)}.at n=8A148897
- Number of trisubstituted linear alkanes of composition C_n H_(2n-1) XYZ.at n=11A159941
- Triangle T(n,k) read by rows: the coefficient [x^k] of the product_{s=1..n} (x+64*cos(s*Pi/(2n+1))^6), 0<=k<=n.at n=17A179838
- Number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.at n=17A188250
- Position of 3^n in A051037 (5-smooth numbers).at n=31A188426
- Number A(n,k) of n X k nonconsecutive chess tableaux; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=73A214088