3545
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
- 4
- Divisor Sum
- 4260
- Proper Divisor Sum (Aliquot Sum)
- 715
- 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
- 2832
- Möbius Function
- 1
- Radical
- 3545
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 56
- 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
- Number of partitions of n if there are two kinds of 1's and two kinds of 2's.at n=18A000097
- Coordination sequence T7 for Zeolite Code DDR.at n=37A008077
- Coordination sequence T4 for Zeolite Code MTW.at n=39A008199
- Pseudoprimes to base 96.at n=19A020224
- Numbers k such that the continued fraction for sqrt(k) has period 11.at n=34A020350
- Fibonacci sequence beginning 1, 24.at n=12A022394
- a(n) = sum of the numbers between the two n's in A026358.at n=30A026361
- Number of ways to partition n elements into pie slices each with an odd number of elements allowing the pie to be turned over.at n=24A032277
- Number of partitions of n with equal number of parts congruent to each of 1, 3 and 4 (mod 5).at n=51A035580
- Number of colors that can be mixed with n >= 0 units of yellow, blue, red.at n=28A048241
- Numerators of convergents to A058914.at n=20A048817
- a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = 2*n - 2 - 2^(p+1) and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = 1 and a(3) = 3.at n=14A049895
- Sum of numbers in range 10*n to 10*n+9.at n=35A053743
- a(n) = n-th squarefree number beginning with n.at n=34A077687
- Sum of n-th antidiagonal of array in A082002.at n=15A082005
- Natural numbers written out with their digits grouped in sets of four (leading zeros omitted).at n=24A091332
- Sum of the left diagonal in ordered 3 X 3 prime squares.at n=21A105090
- Semiprimes a such that there exist three semiprimes b, c and d with a^3=b^3+c^3+d^3.at n=22A113490
- Numbers k such that 1 + k + k^3 + k^5 + k^7 + k^9 + k^11 + ... + k^45 + k^47 is prime.at n=44A124205
- Number of n-bead two-color bracelets with 00 prohibited.at n=23A129526