4196
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 7350
- Proper Divisor Sum (Aliquot Sum)
- 3154
- 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
- 2096
- Möbius Function
- 0
- Radical
- 2098
- Omega Function (Ω)
- 3
- 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
- 64
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Number of simple regular trivalent bicolored graphs with 2n nodes.at n=10A004066
- Coordination sequence T2 for Zeolite Code JBW.at n=43A008122
- Number of simple regular trivalent bipartite graphs with 2n nodes.at n=8A008325
- Triangle read by rows: T(n,k) is the number of simple regular connected bipartite graphs with 2n nodes and degree k, (2 <= k <= n).at n=51A008326
- Triangle read by rows: T(n,k) is the number of simple regular bipartite graphs with 2n nodes and degree k, (0 <= k <= n).at n=69A008327
- Coordination sequence T6 for Zeolite Code VNI.at n=40A009912
- Numbers k such that the continued fraction for sqrt(k) has period 50.at n=19A020389
- COMPOSE natural numbers with primes.at n=5A030281
- 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 32.at n=34A031530
- Number of partitions of n with equal number of parts congruent to each of 1, 3 and 4 (mod 5).at n=52A035580
- Number of partitions of n into parts 5k+1 and 5k+2 with at least one part of each type.at n=54A035631
- Numbers whose base-4 representation contains exactly three 0's and three 1's.at n=25A045031
- Coordination sequence T2 for Zeolite Code ISV.at n=45A047959
- Open 3-dimensional ball numbers (version 3): a(n) is the number of integer points (i,j,k) contained in an open ball of diameter n, centered at (1/2,1/2,0).at n=20A053595
- Composite n such that phi(n+2) = phi(n)+2.at n=44A056774
- Dimension of the space of weight n cuspidal newforms for Gamma_1( 81 ).at n=22A063354
- Unitary untouchable numbers: us(x) = n has no solution where us(x) (A063919) is the sum of the proper unitary divisors of x.at n=29A063948
- Least k such that gcd(prime(k+1)-1, prime(k)-1) = 2n.at n=13A067605
- A Collatz-Fibonacci mixture: a(1) = 1, a(2) = 2, a(n+2) = a(n+1)/2+a(n)/2 if a(n+1) and a(n) have the same parity, a(n+2) = a(n+1)+a(n) otherwise.at n=36A069202
- Numbers m = d_1 d_2 ... d_k (in base 10) with properties that k is even and d_i + d_{k+1-i} = 10 for all i.at n=36A083678