7214
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 10824
- Proper Divisor Sum (Aliquot Sum)
- 3610
- 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
- 3606
- Möbius Function
- 1
- Radical
- 7214
- Omega Function (Ω)
- 2
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 44
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- yes
- 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 meanders in which first bridge is 5.at n=10A006661
- Numbers k such that the continued fraction for sqrt(k) has period 84.at n=18A020423
- a(n) = H_n(1) / 2^floor(n/2) where H_n is the n-th Hermite polynomial.at n=11A025165
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 84.at n=12A031582
- Number of partitions of n with equal number of parts congruent to each of 1, 3 and 4 (mod 5).at n=56A035580
- Denominators of continued fraction convergents to sqrt(249).at n=9A041467
- Least positive integer that can be represented as the sum of a prime and a triangular number in exactly n ways.at n=39A101182
- Number of fusenes with 24 hexagons, C_(2v) symmetry and containing n carbon atoms.at n=9A123606
- a(n) = A128022(n)/n.at n=17A128023
- Number of partitions of n containing at least one part m-6 if m is the largest part.at n=31A212546
- Number of (n+1) X (1+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.at n=8A250576
- T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.at n=36A250583
- T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.at n=44A250583
- Irregular triangle read by rows: T(n,k) = number of meanders with n bridges in which the first bridge is bridge k.at n=58A259974
- Irregular triangle read by rows: T(n,k) = number of meanders with n bridges in which the first bridge is bridge k.at n=61A259974
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 998", based on the 5-celled von Neumann neighborhood.at n=25A273857
- Semiprime numbers whose digit string can be partitioned into three parts such that the product of the first two parts equals the third part.at n=15A280636
- Solution of the complementary equation a(n) = 2*a(n-1) - a(n-2) + b(n-1) -1, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=32A294867
- Numbers k such that m = 2*k is the middle side in a Heronian triangle with sides m - 11, m, m + 11.at n=15A296795
- Partial sums of A299254.at n=16A299260