1084
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 13
- Digital Root
- 4
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 1904
- Proper Divisor Sum (Aliquot Sum)
- 820
- 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
- 540
- Möbius Function
- 0
- Radical
- 542
- Omega Function (Ω)
- 3
- 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
- 44
- 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
- Primes multiplied by 4.at n=57A001749
- a(n) = 1 + Sum_{i=1..n} (n-i+1)*phi(i).at n=21A005598
- Numbers k such that k^64 + 1 is prime.at n=9A006316
- Consider a 2-D cellular automaton generated by the Schrandt-Ulam rule of A170896, but confined to a semi-infinite strip of width n, starting with one ON cell at the top left corner; a(n) is the period of the resulting structure.at n=30A006447
- Coordination sequence T4 for Zeolite Code AFR.at n=25A008022
- Coordination sequence T1 for Zeolite Code LTA and RHO.at n=26A008137
- Coordination sequence T7 for Zeolite Code MFS.at n=20A008179
- Coordination sequence T3 for Zeolite Code MTN.at n=20A008188
- Coordination sequence T4 for Zeolite Code NES.at n=21A008208
- Crystal ball sequence for planar net 4.8.8.at n=28A008577
- E.g.f. exp(sin(log(1+x))).at n=8A009200
- Expansion of log(1+x)*log(1+tan(x)).at n=6A009422
- Coordination sequence T6 for Zeolite Code DFO.at n=25A009880
- Expansion of (1 - x + x^4) / (1 - x)^3.at n=48A016028
- Number of lines through exactly 7 points of an n X n grid of points.at n=33A018814
- Number of lines through exactly 10 points of an n X n grid of points.at n=56A018817
- Squares on infinite chessboard at n moves from center using a {2,3} fairy knight.at n=17A018839
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite AFR = SAPO-40 [Si7Al29P28O128].4TPA.OH starting with a T4 atom.at n=4A018963
- Numbers k such that the continued fraction for sqrt(k) has period 44.at n=4A020383
- Ordered sequence of distinct terms of the form floor(exp(i) * floor(exp(j))), i,j >= 0.at n=23A022765