1311
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 6
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 1920
- Proper Divisor Sum (Aliquot Sum)
- 609
- 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
- 792
- Möbius Function
- -1
- Radical
- 1311
- Omega Function (Ω)
- 3
- 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
- 101
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Numbers that are the sum of 8 positive 5th powers.at n=48A003353
- a(n) = n*(5*n - 1)/2.at n=23A005476
- a(n) = (n-1)*n*(n+4)/6.at n=19A005581
- Numbers that are divisible by the product of their digits.at n=45A007602
- Integers written in factorial base.at n=45A007623
- List of pairs of primes in reverse order.at n=2A007797
- Coordination sequence T1 for Zeolite Code AET.at n=25A008007
- Coordination sequence T4 for Zeolite Code AET.at n=25A008010
- Coordination sequence T5 for Zeolite Code AET.at n=25A008011
- Coordination sequence T7 for Zeolite Code DDR.at n=23A008077
- Coordination sequence T1 for Zeolite Code JBW.at n=24A008121
- Coordination sequence T1 for Zeolite Code MAZ.at n=25A008144
- Triangle of Eulerian numbers with rows multiplied by 1 + x.at n=33A008518
- Triangle of Eulerian numbers with rows multiplied by 1 + x.at n=30A008518
- exp(tanh(x)+arcsinh(x)) = 1+2*x+4/2!*x^2+5/3!*x^3-8/4!*x^4-63/5!*x^5...at n=7A013154
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly three 1's.at n=20A013650
- Number of ordered 5-tuples of integers from [ 1,n ] with no common factors among pairs.at n=19A015663
- (s(n)+s(n+1))/6, where s()=A006521.at n=10A016059
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite LTL = Linde Type L K6Na3[Al9Si27O72].21H2O starting with a T2 atom.at n=4A019034
- Describe previous term from the right (method A - initial term is 3).at n=2A022507