6234
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 12480
- Proper Divisor Sum (Aliquot Sum)
- 6246
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- yes
Derived Values
- Euler's Totient
- 2076
- Möbius Function
- -1
- Radical
- 6234
- 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
- 62
- 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
- a(n) = [ a(n-1)/a(1) ] + [ a(n-3)/a(3) ] + [ a(n-5)/a(5) ] + ..., for n >= 3.at n=36A022872
- a(n) = position of n^3 + (n+1)^3 + (n+2)^3 in A024975.at n=26A024980
- Numerators of continued fraction convergents to sqrt(637).at n=5A042222
- Numbers having four 4's in base 5.at n=33A043368
- Numbers k such that 273*2^k + 1 is prime.at n=33A053353
- McKay-Thompson series of class 26A for Monster.at n=26A058596
- Smallest number a(n)>a(n-1) such that T(a(n-1))+T(a(n))=T(m) for some m, a(1)=3; T(i) are the triangular numbers.at n=21A072522
- Triangle read by rows: T(n, k) = number of permutations <p(1), p(2), ..., p(n)> of <1, 2, ..., n> that end with k, such that p(k) > p(k-1) when k is composite and p(k) < p(k-1) when k is prime. (n > 0, 1 <= k <= n).at n=61A097278
- Look at the first 10 digits of the sequence: they are all different. The same for the next 10. And the next 10, etc. This sequence is the slowest increasing one with that property.at n=42A097912
- Frequency of the hexadecimal 9 in the first 10^n hexadecimal digits of Pi.at n=4A099342
- a(n)=a(n-1)+sum of digits(a(n-1))*sum of digits(a(n-2)).at n=28A108720
- The number of 4-regular plane graphs with n vertices with all faces 3-gons or 4-gons.at n=58A111361
- Bond series for first parallel moment of Kagome lattice.at n=9A120546
- a(1) = 2, a(2) = 2, a(3) = 1, a(n) = a(n-3) + floor(a(n-2)/2) for n >= 4.at n=57A130816
- Integers n>1 such that A141822(n)=4.at n=34A141823
- Triangle T(n,k), read by rows, given by (1, 2, -2, 0, 0, 0, 0, 0, 0, 0, ...) DELTA (1, 2, -1, 0, 0, 0, 0, 0, 0, 0, ...) where DELTA is the operator defined in A084938.at n=38A182412
- Triprimes (numbers that are a product of exactly three primes: A014612) that become cubes when their central digit or central pair of digits is deleted.at n=39A217297
- Number of 3 X n arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 3 X n array.at n=9A219687
- Square roots of numbers in A238334.at n=35A238335
- Number of partitions of n containing m(5) as a part, where m denotes multiplicity.at n=37A240490