6139
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
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 7024
- Proper Divisor Sum (Aliquot Sum)
- 885
- 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
- 5256
- Möbius Function
- 1
- Radical
- 6139
- 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
- 124
- 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
- no
- Odd
- yes
Appears in sequences
- a(0) = 1, a(n) = 17*n^2 + 2 for n>0.at n=19A010007
- Numbers k such that the continued fraction for sqrt(k) has period 78.at n=12A020417
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 36 ones.at n=22A031804
- Composite numbers whose prime factors contain no digits other than 7 and 8.at n=4A036323
- Number of partitions of n such that cn(0,5) = cn(1,5) < cn(2,5) = cn(4,5) <= cn(3,5).at n=70A036870
- Sums of 11 distinct powers of 2.at n=20A038462
- Denominators of continued fraction convergents to sqrt(737).at n=7A042419
- Numbers whose base-4 representation contains exactly two 1's and four 3's.at n=27A045123
- a(n) = 6*2^n - 5.at n=10A048488
- Exponential transform of Pascal's triangle A007318.at n=29A055883
- Exponential transform of Pascal's triangle A007318.at n=34A055883
- Numbers k such that 5*2^k + 7 is prime.at n=22A059748
- a(n) = n*B(n), where B(n) are the Bell numbers, A000110.at n=7A070071
- Sequence of sums of alternating increasing powers of 2.at n=20A079360
- Smallest number that can be written in binary representation as concatenation of other primes in exactly n ways.at n=37A090424
- Expansion of (1-x)^2/((1-x)^3 - 3*x^3).at n=11A097122
- a(n) = n^3 - 2*n^2 + 2.at n=18A100109
- Numbers n such that P(4n) is prime, where P(m) is the number of partitions of m.at n=26A111045
- Semiprimes (A001358) whose digit reversal is a triangular number.at n=25A115741
- Natural number transform of Aitken's triangle.at n=27A127740