1343
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1440
- Proper Divisor Sum (Aliquot Sum)
- 97
- 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
- 1248
- Möbius Function
- 1
- Radical
- 1343
- 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
- 96
- 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
- Numbers that are the sum of 2 positive cubes.at n=52A003325
- G.f.: 1/((1-x)*(1-x^2)*(1-x^3)^2*(1-x^4)*(1-x^5)).at n=27A003402
- a(n) = ceiling(1000*log_10(n)).at n=21A004227
- Primes written in base 5.at n=47A004679
- a(n)=least number m such that m-a(n-1)<>a(j)-a(k) for all j,k less than m; a(1)=1, a(2)=3.at n=35A004979
- Log of g.f. for rooted trees.at n=8A006900
- Coordination sequence T3 for Zeolite Code BRE.at n=24A008060
- Composite but smallest prime factor >= 17.at n=44A008367
- Coordination sequence T4 for Zeolite Code DFO.at n=28A009878
- Coordination sequence T2 for Zeolite Code RTE.at n=25A009891
- Number of Barlow packings that repeat after exactly n layers.at n=17A011768
- a(n) = Sum_{m=1..n} Sum_{k=1..m} prime(k).at n=13A014148
- a(n) = ((n+1)-st Lucas number) - (n-th non-Lucas number).at n=13A014243
- Odd numbers k such that phi(k) | sigma_3(k).at n=28A015809
- Numbers k such that sigma(k) = sigma(k+6).at n=12A015866
- Fibonacci sequence beginning 5, 12.at n=11A022137
- Numbers with exactly 3 3's in their base-5 expansion.at n=32A023736
- s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = A023532, t = (odd natural numbers).at n=47A024372
- s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (Lucas numbers), t = A014306.at n=24A024477
- Numbers that are sums of 2 distinct positive cubes.at n=44A024670