6247
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
- 2
- Divisor Sum
- 6248
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 6246
- Möbius Function
- -1
- Radical
- 6247
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 186
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 812
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- a(n) = floor( n*(n-1)*(n-2)/20 ).at n=51A011902
- Expansion of 1/(1-x^10-x^11-x^12-x^13-x^14-x^15-x^16-x^17-x^18-x^19-x^20).at n=67A017896
- Least k>1 such that first n terms of Kolakoski sequence A000002 repeat in reverse order beginning at k-th term.at n=34A022295
- Convolution of integers >= 3 and Lucas numbers.at n=12A023553
- n written in fractional base 10/6.at n=47A024661
- 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 79.at n=1A031577
- Upper prime of a difference of 18 between consecutive primes.at n=22A031937
- Numbers in which all pairs of consecutive base-8 digits differ by 3.at n=46A033079
- Number of partitions of n with equal nonzero number of parts congruent to each of 2 and 3 (mod 5).at n=42A035569
- Primes of the form k^2+6.at n=9A056909
- Primes of the form 4*k^2 + 163.at n=33A057604
- Smallest prime > the n-th nontrivial power of a prime.at n=44A060846
- Smallest prime larger than square of n-th prime.at n=21A062772
- a(n) = 2*5^n - 3.at n=4A064385
- a(n) = A077347(n)^(1/2).at n=38A077349
- Primes of the form p^2 + 6 where p is prime.at n=5A079141
- Primes in which odd positioned digits are prime and even positioned digits are composite. The least significant digit is taken to be the first digit.at n=35A083820
- Primes p such that (pp'-1)/2 is prime, where p' denotes the next prime after p.at n=44A093706
- a(0)=0 and for n>0, a(n) is the smallest positive integer that cannot be derived by the adding or subtracting at most three terms with values in {a(0),...,a(n-1)} allowing repeats.at n=45A096077
- Prime numbers q such that q^2 = 2*prime(n) + n for some n.at n=34A104852