1475
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 1860
- Proper Divisor Sum (Aliquot Sum)
- 385
- 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
- 1160
- Möbius Function
- 0
- Radical
- 295
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 140
- 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
- no
- Odd
- yes
Appears in sequences
- Number of cells of square lattice of edge 1/n inside quadrant of unit circle centered at 0.at n=43A001182
- a(n) is the solution to the postage stamp problem with 5 denominations and n stamps.at n=10A001210
- a(n) = floor(n*phi^10), where phi is the golden ratio, A001622.at n=12A004925
- Number of numbers of complexity n, i.e., that can be built from n ones using + and *, and require at least that many ones.at n=25A005421
- Number of lattice points inside circle of radius n is 4(a(n)+n)-3.at n=43A007882
- Coordination sequence T1 for Zeolite Code MEI.at n=28A008146
- Coordination sequence T2 for Zeolite Code MEI.at n=28A008147
- Coordination sequence T1 for Zeolite Code -PAR.at n=27A009855
- Carlitz-Riordan q-Catalan numbers (recurrence version) for q=11.at n=3A015096
- Generalized Fibonacci numbers.at n=4A015457
- Quadruples of different integers from [ 1,n ] with no common factors between pairs.at n=23A015623
- Odd numbers k such that d(k) does not divide phi(k).at n=39A015734
- Expansion of 1/((1-2*x) * (1-5*x) * (1-8*x)).at n=3A016297
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite VET = VPI-8 [Si17O34] starting with a T1 atom.at n=10A019247
- Place where n-th 1 occurs in A023127.at n=34A022789
- Discriminants of quartic fields with 2 complex conjugates (negated).at n=32A023681
- Every suffix prime and no 0 digits in base 8 (written in base 8).at n=48A024783
- Number of 3's in all partitions of n.at n=23A024787
- a(n) = least m such that if r and s in {1/1, 1/4, 1/7,..., 1/(3n-2)} satisfy r < s, then r < k/m < s for some integer k.at n=26A024822
- Index of 10^n within the sequence of the numbers of the form 7^i*10^j.at n=49A025745