7586
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 26
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 11382
- Proper Divisor Sum (Aliquot Sum)
- 3796
- 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
- 3792
- Möbius Function
- 1
- Radical
- 7586
- 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
- 70
- 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
- Numbers that are the sum of 12 positive 7th powers.at n=44A003379
- Numbers that are the sum of 6 nonzero 8th powers.at n=11A003384
- a(n) = floor(n*phi^14), where phi is the golden ratio, A001622.at n=9A004929
- Length of n-th term in Look and Say sequences A005150 and A007651.at n=31A005341
- a(n) = 1 + n/2 + 9*n^2/2.at n=41A006137
- Number of partitions of 2*n into at most 4 parts.at n=49A014126
- 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 86.at n=12A031584
- a(n) = A048141(3*n+2).at n=49A051060
- Number of primes between n^4 and (n+1)^4.at n=29A061235
- Integer part of log(n!)^(1 + log(1 + log(n))).at n=20A062443
- Minimal positive solution x of Pell equation y^2 - A077426(n)*x^2 = -4.at n=40A078357
- Number of solutions to x/3 + y/4 + z/6 < n with x,y,z>=1 .at n=8A128822
- a(n) is the number of polyominoes with n edges, including inner edges.at n=34A131487
- a(n) = 5*n^2 + 20*n + 1.at n=37A162316
- Partial sums of near-repdigit primes A056710.at n=19A172983
- Numbers k such that k, k^2 - 5, and k^2 + 5 are semiprime.at n=34A173085
- Twice the coefficient of sqrt(q) in e^h, where e is the fundamental unit and h is the class number of Q(sqrt(q)), q prime and congruent to 1 mod 4. (The coefficient lies in (1/2)Z, so twice it is an integer.)at n=33A225432
- Number of length n+2 0..5 arrays with no consecutive three elements summing to more than 5.at n=4A241611
- T(n,k)=Number of length n+2 0..k arrays with no consecutive three elements summing to more than k.at n=40A241619
- Number of length 5+2 0..n arrays with no consecutive three elements summing to more than n.at n=4A241620