7595
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
- 5
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 10944
- Proper Divisor Sum (Aliquot Sum)
- 3349
- 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
- 5040
- Möbius Function
- 0
- Radical
- 1085
- Omega Function (Ω)
- 4
- 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
- 132
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Number of simplicial polyhedra with n vertices; simple planar graphs with n vertices and 3n-6 edges; maximal simple planar graphs with n vertices; planar triangulations with n vertices; triangulations of the sphere with n vertices; 3-connected cubic planar graphs on 2n-4 vertices.at n=9A000109
- Number of compositions of n into prime parts.at n=26A023360
- Numbers having period-2 6-digitized sequences.at n=25A031357
- Numbers having four 5's in base 6.at n=10A043392
- Numbers k such that k divides the (right) concatenation of all numbers <= k written in base 16 (most significant digit on right, least significant zeros not written).at n=22A061945
- Numbers k such that the smoothly undulating palindromic number (72*10^k - 27)/99 is a prime.at n=7A062221
- Zero, together with positive numbers k such that prime(k) - k is a square.at n=34A064370
- Composite numbers k with no prime factor among (2, 3) (cf. A038509) and such that phi(k) < 2*k/3.at n=25A069043
- Numbers whose set of base 6 digits is {0,5}.at n=27A097252
- Numbers n such that prime(n) - n is a perfect power.at n=41A107607
- Larger members of primitive phi-amicable pairs.at n=11A121249
- a(n) = n*(8*n - 3).at n=31A139273
- 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, -1, 1), (-1, 1, -1), (1, 0, 0), (1, 0, 1)}.at n=8A149875
- Coefficient triangle sequence of a polynomial recursion: p(x,n)=(x + 1)*(p(x, n - 1) + 3^(n - 2)*(x + x^Floor[n/2] + x^(n - 2))); Row sums are 2*3^n.at n=50A153311
- Twin natural nonprimes with nonprime number of prime factors.at n=26A171995
- Expansion of 1/(1-x^2-x^3+x^7-x^8+x^10).at n=42A174577
- Positive integers of the form (6*m^2 + 1)/11.at n=21A179337
- Number of strings of numbers x(i=1..5) in 0..n with sum i^2*x(i) equal to n*25.at n=19A183956
- Third accumulation array, T, of the natural number array A000027, by antidiagonals.at n=40A185508
- Numbers n not divisible by 2 or 3 such that k^k == k+1 (mod n) has no nonzero solutions.at n=35A191834