6602
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
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 9906
- Proper Divisor Sum (Aliquot Sum)
- 3304
- 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
- 3300
- Möbius Function
- 1
- Radical
- 6602
- 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
- 137
- 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
- Expansion of 1/((1-x)^3*(1-x^2)^2*(1-x^3)).at n=20A002625
- Number of integer points (x,y,z) at distance <= 0.5 from sphere of radius n.at n=23A016728
- Numbers k such that the continued fraction for sqrt(k) has period 23.at n=27A020362
- Number of T-frame polyominoes with n cells.at n=46A028247
- Partial sums of A000009 (partitions into distinct parts).at n=38A036469
- Numbers whose base-3 representation contains exactly four 0's and four 1's.at n=35A044989
- Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 23.at n=12A051988
- a(n) = 4*n^2 - 3*n + 1.at n=41A054552
- Bisection (odd part) of Chebyshev sequence with Diophantine property.at n=6A077234
- Combined Diophantine Chebyshev sequences A054491 and A077234.at n=13A077237
- Integers n such that 10^n+91 is a prime number.at n=12A110918
- Semiprimes in A054552.at n=12A113690
- Expansion of 1 + Sum_{k>0} x^k^2/((1-x)(1-x^2)...(1-x^(2k))).at n=46A122129
- Expansion of o.g.f. (1-x^2+x^4)/((1-x)^2*(1-x^2)^4*(1-x^3)^4).at n=15A123991
- Number of subsets of {1, 2, ..., n} such that no member is a sum of distinct other members.at n=18A151897
- Numbers k such that k, k^2 - 5, and k^2 + 5 are semiprime.at n=29A173085
- a(n+1) = a(n) + floor(a(n)/6) with a(0) = 6.at n=48A182307
- Numbers congruent to 2 in the structure of A211000.at n=16A211001
- Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and -1<=w+2x+3y<=1.at n=41A211623
- a(n) is the minimum number greater than a(n-1) such that the concatenation a(n) U a(n-1) U ... U a(1) is a Niven number, starting with a(1)=1.at n=34A239543