1135
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1368
- Proper Divisor Sum (Aliquot Sum)
- 233
- 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
- 904
- Möbius Function
- 1
- Radical
- 1135
- 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
- 62
- 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
- No-3-in-line problem on n X n grid: total number of ways of placing 2n points on n X n grid so no 3 are in a line. No symmetries are taken into account.at n=9A000755
- Primes multiplied by 5.at n=48A001750
- Number of integer points in a certain quadrilateral scaled by a factor of n.at n=50A002789
- Expansion of g.f.: (1+x^3)*(1+x^4)/((1-x)*(1-x^2)^2*(1-x^4)).at n=29A004657
- Centered triangular numbers: a(n) = 3*n*(n-1)/2 + 1.at n=27A005448
- a(n) = (n^3 + 2*n)/3.at n=15A006527
- Logarithmic transform of Fibonacci numbers.at n=8A007553
- Coordination sequence T2 for Zeolite Code LAU.at n=24A008125
- Crystal ball sequence for E_6 lattice.at n=2A008400
- a(n) = Sum_{k=1..n} k*phi(k).at n=16A011755
- Partial sums of A003136.at n=30A014146
- q-Fibonacci numbers for q=2, scaling a(n-2).at n=7A015459
- Number of ordered 5-tuples of integers from [ 2,n ] with no global factor.at n=8A015651
- Numbers k such that the continued fraction for sqrt(k) has period 32.at n=12A020371
- Numbers k such that Fibonacci(k) == -5 (mod k).at n=36A023165
- [ Sum{(log(j)-log(i))^2} ], 2 <= i < j <= n.at n=42A025206
- Index of 4^n within the sequence of the numbers of the form 4^i*6^j.at n=53A025703
- Index of 5^n within the sequence of the numbers of the form 5^i*8^j.at n=53A025709
- a(n) = sum of the numbers between the two n's in A026350.at n=31A026353
- 4th power of the lower triangular normalized Eulerian number matrix.at n=3A027539