1065
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 12
- Digital Root
- 3
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 1728
- Proper Divisor Sum (Aliquot Sum)
- 663
- 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
- 560
- Möbius Function
- -1
- Radical
- 1065
- 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
- 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
- a(n) = a(n-1) + a(n-2) - a(n-3).at n=41A002798
- Number of partitions of n into parts 5k+1 or 5k+4.at n=50A003114
- Numbers that are the sum of 11 positive 5th powers.at n=46A003356
- a(n) = ceiling(n*phi^9), where phi is the golden ratio, A001622.at n=14A004964
- a(n) = a(n-2) + a(n-3), with a(0) = 0, a(1) = 1, a(2) = 4.at n=24A007309
- Coordination sequence T1 for Zeolite Code CHA.at n=25A008066
- Coordination sequence T2 for Zeolite Code FER.at n=20A008107
- Coordination sequence T2 for Zeolite Code MTT.at n=20A008190
- Coordination sequence T2 for Zeolite Code -CHI.at n=21A009847
- Coefficients in expansion of e as Sum_{n>=1} a(n)/(n*n!*(n+1)!), as found by greedy algorithm.at n=35A011189
- Triangle of numbers of hybrid rooted trees (divided by Fibonacci numbers).at n=23A011274
- a(n) = A011916(n) + A011922(n) - 1.at n=2A011918
- Numbers k that divide s(k), where s(1)=1, s(j)=25*s(j-1)+j.at n=46A014876
- Numbers k such that k | 14^k + 1.at n=27A015965
- Expansion of 1/(1-x^6-x^7-x^8-x^9).at n=48A017849
- Cycle class sequence c(2n) (the number of true cycles of length 2n in which a certain node is included) for zeolite DFO = DAF-1 [Mg14Al52P66O264].7R.40H2O starting with a T2 atom.at n=4A019004
- (n-2)nd Catalan number is congruent to n/3 mod n.at n=42A019467
- Pseudoprimes to base 23.at n=17A020151
- Pseudoprimes to base 26.at n=22A020154
- Pseudoprimes to base 32.at n=20A020160