6238
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 9360
- Proper Divisor Sum (Aliquot Sum)
- 3122
- 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
- 3118
- Möbius Function
- 1
- Radical
- 6238
- 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
- 49
- 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
- Boustrophedon transform of powers of 2.at n=7A000752
- 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 78.at n=11A031576
- Numbers k such that 169*2^k+1 is prime.at n=17A032461
- Interprimes (A024675) which are of the form s*prime, s=2.at n=43A075277
- Least positive integers, all distinct, that satisfy sum(n>0,1/a(n)^z)=0, where z=(60+I*11)/61.at n=27A084804
- Right-truncatable semiprimes.at n=49A085733
- Least k such that k*Mersenne - prime(n) + 1 is prime.at n=22A098556
- Number of permutations of length n which avoid the patterns 3124, 3241, 4321.at n=8A116831
- Numbers k such that 3*k^k-1 is prime.at n=5A118305
- Number of base 30 circular n-digit numbers with adjacent digits differing by 3 or less.at n=4A125340
- a(n+1) = a(n)^2 + 2*a(n) - 2 and a(1) = 8.at n=2A145508
- 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, 0), (-1, 0, -1), (-1, 0, 1), (0, -1, 1), (1, 1, 0)}.at n=8A149178
- a(n) = prime(n)^2-3.at n=21A182200
- 1/4 the number of arrangements of 4 nonzero numbers x(i) in -n..n with the sum of sign(x(i))*(|x(i)| mod x(i+1)) equal to zero.at n=12A189953
- Number of partitions of n containing at least one part m-8 if m is the largest part.at n=29A212548
- Number of (w,x,y,z) with all terms in {1,...,n} and w+y=|x-y|+|y-z|.at n=23A212677
- Costas arrays such that the corresponding permutation is connected.at n=19A213339
- Numbers k such that k^11 + 11*k + 11^k is prime.at n=10A220787
- The number of boundary edges for all ordered trees with n edges.at n=7A228178
- Integers k such that (k^2 + (k+1)^2) has no square proper substring.at n=52A238903