1841
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2112
- Proper Divisor Sum (Aliquot Sum)
- 271
- 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
- 1572
- Möbius Function
- 1
- Radical
- 1841
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 130
- 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
- Expansion of 1/((1-x)^2*(1-x^2)*(1-x^3)).at n=37A000601
- a(n) = solution to the postage stamp problem with 3 denominations and n stamps.at n=28A001208
- Coordination sequence T4 for Zeolite Code DOH.at n=26A008081
- Coordination sequence T1 for Zeolite Code HEU.at n=28A008116
- Coordination sequence T1 for Zeolite Code AHT.at n=29A009866
- Coordination sequence T2 for Zeolite Code VET.at n=26A009903
- Numbers k such that the continued fraction for sqrt(k) has period 42.at n=13A020381
- Numbers k such that Fib(k) == -13 (mod k).at n=12A023167
- a(n) = (n + 3)^2 - 8.at n=40A028884
- Boustrophedon transform of 1 followed by Thue-Morse sequence A001285.at n=7A029885
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 24 ones.at n=10A031792
- Numbers with exactly five distinct base-6 digits.at n=31A031983
- a(n) = floor ( n(n+1)(n+2)(n+3) / (n+(n+1)+(n+2)+(n+3)) ).at n=18A032767
- Fractional part of square root of a(n) starts with 9: first term of runs.at n=37A034115
- Number of n-node rooted trees of height at most 9.at n=11A034826
- Coordination sequence T3 for Zeolite Code SFF.at n=28A038433
- Numbers k such that 1 and 4 occur juxtaposed in the base-10 representation of k but not of k-1.at n=36A043227
- Numbers k such that 1 and 4 occur juxtaposed in the base-10 representation of k but not of k+1.at n=36A044007
- Numbers k such that string 6,1 occurs in the base 8 representation of k but not of k-1.at n=31A044236
- Numbers k such that the string 6,5 occurs in the base 9 representation of k but not of k-1.at n=24A044310