8462
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
- 5
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 12696
- Proper Divisor Sum (Aliquot Sum)
- 4234
- 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
- 4230
- Möbius Function
- 1
- Radical
- 8462
- 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
- 39
- 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
- Second-order Fibonacci numbers.at n=17A010049
- Number of ordered 5-tuples of integers from [ 2,n ] with no common factors among triples.at n=17A015657
- a(n) = self-convolution of row n of array T given by A027926.at n=8A027989
- 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 90.at n=25A031588
- Numbers m such that m^2 ends in 444.at n=33A039685
- Number of right triangles of a given area required to form successively larger squares.at n=45A060626
- Heights of peaks of more than 8000 meters (as of Sep 25 2001), in decreasing order.at n=4A064296
- Number of hierarchical orderings ("societies") of n labeled elements ("individuals") with at least two occupied levels.at n=5A097237
- Numbers n such that 8*10^n + 2*R_n - 1 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=7A103074
- Numbers n such that 6*5^n + 1 is prime.at n=14A143279
- 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, 1, 0), (0, 1, -1), (1, -1, 0), (1, 0, 1)}.at n=8A149034
- 1/4 the number of (n+1) X 8 binary arrays with all 2 X 2 subblock sums the same.at n=13A183984
- Principal diagonal of the convolution array A213756.at n=7A213757
- Numbers n such that Q(sqrt(n)) has class number 7.at n=25A218039
- Numbers k such that anti-phi(k) = anti-phi(k+1).at n=39A241003
- Answer to Red, Green and Blue Tiles Problem.at n=17A244281
- Prime sieve of the square root of 2.at n=12A248831
- Expansion of Product_{k>=1} 1/(1-x^k)^(k*(k-1)).at n=12A258348
- a(n) = n^3 + (n+1)*(n+2).at n=20A270109
- Lexicographically earliest sequence of distinct positive terms such that a(n) is present in 3*a(n+1).at n=61A338942