1346
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
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 2022
- Proper Divisor Sum (Aliquot Sum)
- 676
- 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
- 672
- Möbius Function
- 1
- Radical
- 1346
- 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
- 65
- 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
- A self-generating sequence: a(1)=1, a(2)=2, a(n+1) chosen so that a(n+1)-a(n-1) is the first number not obtainable as a(j)-a(i) for 1<=i<j<=n.at n=41A001149
- Numbers k such that phi(k) = phi(k+2).at n=28A001494
- Number of partitions of at most n into at most 5 parts.at n=21A002622
- Numbers k such that phi(k) = phi(sigma(k)).at n=49A006872
- Coordination sequence T4 for Zeolite Code BRE.at n=24A008061
- Coordination sequence T1 for Zeolite Code KFI.at n=28A008123
- Coordination sequence T3 for Zeolite Code SGT.at n=23A008231
- Coordination sequence T1 for Cordierite.at n=22A008251
- a(0) = 1, a(n) = 21*n^2 + 2 for n>0.at n=8A010011
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite YUG = Yugawaralite Ca2[Al4Si12O32].8H2O starting at a T1 atom.at n=10A019264
- Least k such that A(k) = n, where A( ) is sequence A020945.at n=51A020949
- Fibonacci sequence beginning 4, 22.at n=10A022385
- a(n) = a(n-1) + c(n-1) for n >= 2, a( ) increasing, given a(1)=4; where c( ) is complement of a( ).at n=46A022936
- Numbers whose least quadratic nonresidue (A020649) is 5.at n=44A025022
- [ Sum{(sqrt(j+1)-sqrt(i+1))^3} ], 1 <= i < j <= n.at n=22A025223
- Numbers that are the sum of 3 nonzero squares in exactly 7 ways.at n=48A025327
- Number of partitions of n into an odd number of parts, the greatest being 6; also, a(n+11) = number of partitions of n+5 into an even number of parts, each <=6.at n=42A026926
- Squarefree m with no 4k+3 factors such that Pell equation x^2 - m*y^2 = -1 is insoluble.at n=33A031398
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 36.at n=2A031534
- Numbers whose base-5 expansions have 5 distinct digits.at n=27A031946