6454
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
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 11088
- Proper Divisor Sum (Aliquot Sum)
- 4634
- 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
- 2760
- Möbius Function
- -1
- Radical
- 6454
- 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
- 106
- 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
- Expansion of 1/(1-x^2-x^3-x^4-x^5-x^6).at n=22A013983
- Number of partitions of n with equal number of parts congruent to each of 0, 1 and 4 (mod 5).at n=54A035574
- Number of partitions of n into parts not of the form 17k, 17k+7 or 17k-7. Also number of partitions with at most 6 parts of size 1 and differences between parts at distance 7 are greater than 1.at n=32A035968
- Smallest positive integer m such that m = pi(n*m) = A000720(n*m).at n=8A038626
- 19-gonal (or enneadecagonal) numbers: n(17n-15)/2.at n=28A051871
- Coefficients in the series (1 + x - x^4 - x^6 - x^8 - x^9 - x^10 - x^12 - x^14 ...)/(1 - x^2 - x^3 - x^5 - x^7 - x^11 - x^13 ...).at n=25A058354
- Fifth convolution of A001045(n+1) (generalized (1,2)-Fibonacci), n>=0, with itself.at n=6A073375
- Expansion of reciprocal of Hauptmodul for Gamma_0(18).at n=60A092848
- Number of irregular primes less than or equal to the 2^n-th prime.at n=13A105465
- Numbers n such that 55*10^n + 1 is prime.at n=14A109800
- Expansion of 1/(1-x^2-x^3-x^6).at n=29A121833
- Expansion of q^(-1) * (phi(q) / phi(q^9) - 1) / 2 in powers of q^3 where phi() is a Ramanujan theta function.at n=60A128111
- Numbers k such that k and k^2 use only the digits 0, 1, 4, 5 and 6.at n=13A136855
- Numbers k such that k and k^2 use only the digits 1, 2, 4, 5 and 6.at n=44A136988
- Numbers k such that k and k^2 use only the digits 1, 3, 4, 5 and 6.at n=13A137021
- Numbers k such that k and k^2 use only the digits 1, 4, 5 and 6.at n=2A137045
- Numbers k such that k and k^2 use only the digits 1, 4, 5, 6 and 7.at n=5A137046
- Numbers k such that k and k^2 use only the digits 1, 4, 5, 6 and 8.at n=7A137047
- Numbers k such that k and k^2 use only the digits 1, 4, 5, 6 and 9.at n=7A137048
- a(n) = name of smallest positive number in Spanish which has the letter E in the n-th position starting from the end, or -1 if no such number exists.at n=34A173182