3941
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 4512
- Proper Divisor Sum (Aliquot Sum)
- 571
- 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
- 3372
- Möbius Function
- 1
- Radical
- 3941
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 25
- 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
- no
- Odd
- yes
Appears in sequences
- Coordination sequence T4 for Zeolite Code BRE.at n=41A008061
- Coordination sequence T1 for Zeolite Code GOO.at n=43A008111
- Coordination sequence T2 for Zeolite Code ZON.at n=44A009920
- Numbers that are the sum of 4 positive cubes in exactly 3 ways.at n=41A025405
- Concatenation of n and n + 2 or {n,n+2}.at n=38A032607
- Denominators of continued fraction convergents to sqrt(971).at n=8A042879
- Concatenate "n" and "nextprime(n)".at n=38A049852
- Starting positions of strings of 2 7's in the decimal expansion of Pi.at n=34A050254
- Numbers k such that 199*2^k-1 is prime.at n=35A050851
- Numbers n such that n | 7^n + 6^n + 1.at n=13A057298
- Number of singular points on n-th order Chmutov surface.at n=21A057870
- Row sums of triangle A060923 (even part of bisection of Lucas triangle).at n=5A060926
- Number of compositions of n such that two adjacent parts are not equal modulo 4.at n=17A062202
- Triangle T(n,k) giving number of Dyck paths of length 2n with exactly k hills (0 <= k <= n).at n=69A065600
- A Collatz-Fibonacci mixture: a(1) = 1, a(2) = 2, a(n+2) = a(n+1)/2+a(n)/2 if a(n+1) and a(n) have the same parity, a(n+2) = a(n+1)+a(n) otherwise.at n=32A069202
- a(n+4) = a(n+1) - a(n), a(0) = 1, a(1) = -4, a(2) = 0, a(3) = 1.at n=45A110064
- Partial sum of (Catalan numbers A000108 multiplied by powers of 4).at n=4A112698
- Triangle built from partial sums of Catalan numbers A000108 multiplied by powers.at n=40A112705
- Square root of pi(A064523(n)).at n=9A115835
- Numbers k such that the k-th triangular number contains only digits {1,6,7}.at n=12A119141