1095
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 1776
- Proper Divisor Sum (Aliquot Sum)
- 681
- 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
- 576
- Möbius Function
- -1
- Radical
- 1095
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 75
- 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
- no
- Odd
- yes
Appears in sequences
- Numbers that are the sum of 10 positive 5th powers.at n=44A003355
- Number of connected labeled T_0-T_4-topologies with n points.at n=5A006059
- Numbers k such that phi(k) = phi(sigma(k)).at n=42A006872
- Coordination sequence T3 for Zeolite Code AFT.at n=25A008028
- Expansion of Jacobi theta constant theta_2^6 /(64q^(3/2)).at n=24A008440
- a(n) = n OR n^2 (applied to ternary expansions).at n=32A008467
- Coordination sequence T1 for Zeolite Code -WEN.at n=24A009862
- (n-2)-th Catalan number is congruent to 2n/3 mod n.at n=47A019468
- Pseudoprimes to base 74.at n=14A020202
- Number of 2's in n-th term of A007651.at n=28A022467
- Ordered sequence of distinct terms of the form floor(exp(i) * floor(exp(j))), i,j >= 0.at n=26A022765
- a(n) = 1*t(n) + 2*t(n-1) + ... + k*t(n+1-k), where k=floor((n+1)/2) and t(n)=2*n+1 (odd numbers).at n=17A023865
- a(n) = s(1)*t(n) + s(2)*t(n-1) + ... + s(k)*t(n-k+1), where k = floor(n/2), s = natural numbers, t = odd natural numbers.at n=16A024862
- a(n) = position of n^3 + (n+1)^3 + (n+2)^3 in A024975.at n=14A024980
- a(0) = 16, a(n+1) = 3a(n) - (6-n)^2.at n=7A028493
- Numbers n such that n divides the (left) concatenation of all numbers <= n written in base 22 (most significant digit on right and removing all least significant zeros before concatenation).at n=9A029539
- Numbers k such that k-2 and k+2 are consecutive primes.at n=42A029708
- Number of even graphical partitions of order 2n - number of odd graphical partitions of order 2n.at n=6A029892
- a(1) = 1, a(n+1) = Sum_{k = 1..n} p(k)*a(n+1-k), where p(k) is the k-th prime.at n=6A030017
- Positions of records in A030717.at n=36A030722