7065
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 18
- Digital Root
- 9
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 12324
- Proper Divisor Sum (Aliquot Sum)
- 5259
- 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
- 3744
- Möbius Function
- 0
- Radical
- 2355
- 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
- 101
- 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
- Low temperature series for spin-1/2 Ising partition function on 3-dimensional simple cubic lattice.at n=13A002891
- Pseudoprimes to base 28.at n=28A020156
- a(n) = n*(7*n - 1)/2.at n=45A022264
- Numbers k such that 2^k + 17 is prime.at n=11A057200
- Number of conjugacy classes of subgroups of PSL(3,q) as q runs through the prime powers (A246655).at n=9A138082
- a(n) = n*(14*n + 13) + 3.at n=22A195029
- Number n such that a2 - n^3 is a triangular number (A000217), where a2 is the least square above n^3.at n=26A233400
- Solutions to phi(n) = phi(sigma(n)) that are not given by Theorem 3 of Golomb's manuscript.at n=39A260021
- Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 489", based on the 5-celled von Neumann neighborhood.at n=12A282608
- Numbers k such that (2^k + 3)/5 is prime.at n=8A284285
- Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than nine.at n=11A292215
- a(n) is the total number of down-steps after the final up-step in all 4_2-Dyck paths of length 5*n (n up-steps and 4*n down-steps).at n=4A334611
- Number of points on or inside the circle of radius n, as rasterized by the midpoint circle algorithm.at n=47A341198
- Number of fixed n-polysticks (or polyedges) in 5 dimensions.at n=3A365564
- Integers k such that 2^k contains all powers of 2 not exceeding k as substrings.at n=12A372680
- Consecutive states of the linear congruential pseudo-random number generator (421*s + 1663) mod 7875 when started at s=1.at n=23A385003
- Square array read by antidiagonals: T(n,d) is the number of fixed d-dimensional polysticks of size n.at n=31A385581