11070
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 9
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 32
- Divisor Sum
- 30240
- Proper Divisor Sum (Aliquot Sum)
- 19170
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 2880
- Möbius Function
- 0
- Radical
- 1230
- Omega Function (Ω)
- 6
- Little Omega Function (ω)
- 4
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
- 130
- 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
- a(n) = 1 + F(2*n+1) + (-1)^n*L(n).at n=10A006172
- Coordination sequence for 4-dimensional RR-centered di-isohexagonal orthogonal lattice.at n=10A008528
- Numbers n such that n | (sigma_5(n) - phi(n)^5).at n=19A055699
- Numbers k such that sigma(k) divides sigma(sigma(k)).at n=25A066961
- Number array whose rows are the series reversions of x(1-x)/(1+x)^k, read by antidiagonals.at n=59A107111
- a(n) = 11 + floor( (1 + Sum_{j=1..n-1} a(j)) / 2).at n=17A120139
- Number of Lyndon words on {1,2,3} with an odd number of 1's and an odd number of 2's.at n=11A136704
- Averages of twin prime pairs of A154546.at n=39A154548
- a(n) is the number of corner-rooted hexangulations of girth 6 with n inner faces.at n=5A179300
- Number of n-step prudent self-avoiding walks on hexagonal [= triangular] lattice.at n=6A192208
- Numbers n such that sum of squares of digits of n equals the sum of prime divisors of n.at n=25A217390
- Numbers k such that 1 + k + k^3 + k^5 + k^7 + k^9 + ... + k^57 is prime.at n=31A244390
- Numbers n such that the smallest prime divisor of n^2+1 is 89.at n=41A248551
- Bisection of A136704.at n=5A253076
- a(n) = 12*n^2 + 10*n - 30.at n=30A277982
- Triangle read by rows: T(n,k) is the number of edge covers of the complete labeled graph on n nodes that are minimal and have exactly k edges, n>=2, 1<=k<=n-1.at n=43A281269
- Numbers n such that n * (x-1)/x produces a rotation of the digits in n for some value of x.at n=20A288626
- a(n) = 972*n^2 - 1224*n + 414 with n > 0.at n=3A304166
- Number of fully normal integer partitions of n.at n=48A317491
- Numbers k such that the sum of the norm of divisors of k in Gaussian integers is divisible by k.at n=23A332736