1306
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 10
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1962
- Proper Divisor Sum (Aliquot Sum)
- 656
- 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
- 652
- Möbius Function
- 1
- Radical
- 1306
- 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
- 26
- 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
- yes
- Odd
- no
Appears in sequences
- Numbers that are the sum of 11 positive 6th powers.at n=21A003367
- a(n) = floor(n*phi^7), where phi is the golden ratio, A001622.at n=45A004922
- Centered triangular numbers: a(n) = 3*n*(n-1)/2 + 1.at n=29A005448
- Numbers n such that n^32 + 1 is prime.at n=26A006315
- Minimum diameter of an integral set of n points in the plane, not all on a line.at n=46A007285
- Coordination sequence T3 for Zeolite Code MFI.at n=23A008166
- Coordination sequence T1 for Scapolite.at n=23A008262
- Numbers k such that sum of divisors of k^2 is a square.at n=4A008847
- Coordination sequence T1 for Zeolite Code VSV.at n=23A009914
- A B_2 sequence: a(n) = least value such that the sequence increases and pairwise sums of distinct terms are all distinct.at n=30A010672
- Coefficients in expansion of Pi as Sum_{n>=1} a(n)/(n*n!*(n+1)!), as found by greedy algorithm.at n=43A011191
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite RUT = RUB-10 R4[B4Si32O72] starting from a T1 atom.at n=10A019234
- Numbers k such that the continued fraction for sqrt(k) has period 25.at n=5A020364
- Least k such that A020951(k) = n.at n=34A020953
- Number of down/up (initially descending) compositions of n.at n=18A025049
- Sequence satisfies T^2(a)=a, where T is defined below.at n=35A027594
- Golc sequence in base 3. Left to right concatenation of n,int(log_3(n)),int(log_3(int(log_3(n)))),... in base 3.at n=47A028433
- a(n) = Sum_{k divides 3^n} S(k), where S is the Kempner function A002034.at n=34A029714
- Graham-Sloane-type lower bound on the size of a ternary (n,3,3) constant-weight code.at n=43A030503
- Numbers having period-2 3-digitized sequences.at n=44A031180