8134
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 14364
- Proper Divisor Sum (Aliquot Sum)
- 6230
- 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
- 3444
- Möbius Function
- 0
- Radical
- 1162
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 114
- 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
- Number of n-step walks on square lattice.at n=8A002900
- Number of increasing sequences of Goldbach type with maximal element n.at n=16A008929
- Population of "Triangle" cellular automaton at n-th generation.at n=40A018189
- Numbers k such that the continued fraction for sqrt(k) has period 76.at n=19A020415
- a(n) = [ 2nd elementary symmetric function of {log(k)} ], k = 2,3,...,n.at n=42A025202
- Numbers k such that 163*2^k+1 is prime.at n=34A032458
- a(n) = smallest k such that k! ends in 2^n, not counting the trailing zeros.at n=14A058885
- Number of subsets S of T={0,1,2,...,n} such that each element of T is the sum of two (not necessarily distinct) elements of S.at n=15A066062
- Numbers n such that phi(reverse(n)) = phi(reverse(n-1)) + phi(reverse(n-2)).at n=20A069969
- Sums of (one or more distinct) k-perfect numbers.at n=32A083865
- Numbers k such that the numerator of Bernoulli(2k) is divisible by the square of 37, the first irregular prime.at n=29A092230
- Molien series for complete weight enumerators of trace-additive Hermitian self-dual codes over the Galois ring GR(4,2) that contain the all-ones vector.at n=8A100025
- Trajectory of 1001 under "3x+1" map.at n=28A100709
- Values of m such that A139361(n)=4m+1.at n=21A139362
- 7 times pentagonal numbers: a(n) = 7*n*(3*n-1)/2.at n=28A152744
- The number of symmetric numerical sets with odd Frobenius number and no small atoms.at n=15A164047
- Sums of distinct perfect numbers.at n=9A185351
- Second accumulation array, T, of the natural number array A000027, by antidiagonals.at n=71A185507
- Number of two-sided n-step prudent walks avoiding two or more consecutive west steps and two or more consecutive south steps.at n=10A190589
- Triangle read by rows: T(n,k) is the number of secondary structures of size n having k stacks of odd length (n>=0, k>=0).at n=51A202845