1544
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
- 8
- Divisor Sum
- 2910
- Proper Divisor Sum (Aliquot Sum)
- 1366
- 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
- 768
- Möbius Function
- 0
- Radical
- 386
- Omega Function (Ω)
- 4
- 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
- 122
- 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
- Number of collinear point-triples in an n X n grid.at n=7A000938
- Numbers that are the sum of 6 positive 5th powers.at n=40A003351
- a(n) = 1000*log_10(n) rounded down.at n=34A004225
- a(n) = 1000*log_10(n) rounded to the nearest integer.at n=34A004226
- Sum of 11 positive 9th powers.at n=3A004800
- Numbers that are the sum of at most 11 positive 9th powers.at n=41A004895
- Number of connected regular simple graphs of degree 4 (or quartic graphs) with n nodes.at n=12A006820
- a(n) = a(n-1) + a(n-1-(number of odd terms so far)).at n=25A007604
- Coordination sequence T3 for Zeolite Code BOG.at n=28A008051
- Coordination sequence T1 for Zeolite Code GIS.at n=29A008266
- Expansion of (1+x^11)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=48A008772
- Expansion of e.g.f. = sin(tan(log(1+x))).at n=7A009499
- Coordination sequence T1 for Keatite.at n=22A009844
- Coordination sequence T4 for Zeolite Code -CLO.at n=35A009853
- Coordination sequence T1 for Zeolite Code WEI.at n=28A009917
- Number of ferrites M_6Y_n that repeat after 6n+30 layers.at n=19A011962
- Numbers k such that phi(k) + 9 | sigma(k + 9).at n=19A015788
- Number of partitions of n with distinct parts p(i) such that if i != j, then |p(i) - p(j)| >= 3.at n=63A025157
- Expansion of 1/(x^10+x^9-x^7-x^6-x^5-x^4-x^3+x+1) (inverse of Salem polynomial).at n=56A029826
- Numbers k such that the continued fraction for sqrt(k) has even period 2*m and the m-th term of the periodic part is 9.at n=20A031412