6494
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 23
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 10368
- Proper Divisor Sum (Aliquot Sum)
- 3874
- 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
- 3040
- Möbius Function
- -1
- Radical
- 6494
- Omega Function (Ω)
- 3
- Little Omega Function (ω)
- 3
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
- 49
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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+x)/(1-x-x^2-x^4-x^5).at n=15A014743
- 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 80.at n=4A031578
- Number of partitions of n into parts not of the form 11k, 11k+2 or 11k-2. Also number of partitions with 1 part of size 1 and differences between parts at distance 4 are greater than 1.at n=39A035945
- Composite numbers k such that sigma(k)*(phi(k) + 2) is a square.at n=17A065655
- Expansion of Product_{k>=1} (1 + A001055(k)*x^k).at n=36A066816
- Numbers k such that phi(k) + phi(k+1) = k+2.at n=16A067797
- Partial sums of A068058 + 1.at n=32A068059
- a(n) = n * [1 + sum(k=1 to n-1) prime(k)].at n=17A083719
- Sum of first n 6-almost primes.at n=18A086052
- Number of squares on infinite quarter chessboard at <=n knight moves from the corner.at n=43A098500
- 3-almost primes with semiprime digits (digits 4, 6, 9 only).at n=17A111494
- Multiples of 17 whose reversal + 1 is also a multiple of 17.at n=19A166391
- Integers whose binary digits "1" define, if sorted into a quadrant shape whose right angle lies in a Go board corner, same colored Go stones that surely live all, but not if any stone is omitted.at n=8A166537
- Coefficient of x in the reduction by (x^2 -> x+1) of the polynomial C(n)*x^n, where C=A022095.at n=9A192917
- Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..3 introduced in row major order.at n=4A204476
- Number of (n+2)X7 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..3 introduced in row major order.at n=4A204480
- a(n) = n*(n+1) + (n+2)*(n+3) + (n+4)*(n+5).at n=44A217775
- Expansion of 1/(1 - x^4 - x^5 - x^6 - x^7 - x^8 + x^12).at n=38A225501
- The Wiener index of the graph obtained by applying Mycielski's construction to the cycle graph C(n).at n=27A228320
- Positions of 3's in A234323.at n=2A234804