8486
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 26
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 12732
- Proper Divisor Sum (Aliquot Sum)
- 4246
- 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
- 4242
- Möbius Function
- 1
- Radical
- 8486
- 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
- 109
- 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
- Numbers k such that the continued fraction for sqrt(k) has period 90.at n=15A020429
- 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 92.at n=2A031590
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 42 ones.at n=40A031810
- Binomial transform of A033192.at n=8A033193
- Row sums of triangle defined in A059226.at n=6A059228
- Harmonic mean of digits is 6.at n=15A062184
- Matrix cube of triangle A105535 and, in this flattened form as read by rows, also equals diagonal 2 of A105535.at n=48A105539
- Index of first occurrence of n-th prime in A001203, the continued fraction for Pi.at n=36A107892
- Positions of high-water marks of A118421.at n=44A118423
- Records in A118878.at n=5A119903
- Least semiprime s for which the Mertens function M(s) = n.at n=29A123173
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 1), (1, -1, 1), (1, 0, 1), (1, 1, -1)}.at n=8A149017
- Numbers k such that k^81*(k^81+1)+1 is prime.at n=39A153442
- G.f.: exp( Sum_{n>=1} [Sum_{d|n} (-1)^(n-d)*d^n] * x^n/n ).at n=6A163203
- Numbers k such that k, k^2 - 5, and k^2 + 5 are semiprime.at n=39A173085
- Numbers n such that the sum of the digits of the numbers from 0 to n is a square.at n=39A271626
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 605", based on the 5-celled von Neumann neighborhood.at n=19A273177