7061
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 7392
- Proper Divisor Sum (Aliquot Sum)
- 331
- 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
- 6732
- Möbius Function
- 1
- Radical
- 7061
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 31
- 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
- no
- Odd
- yes
Appears in sequences
- a(n) = (d(n)-r(n))/5, where d = A026057 and r is the periodic sequence with fundamental period (1,0,3,1,0).at n=52A026059
- T(2n+1,n+4), T given by A026758.at n=5A026879
- Shifts left 2 places under "DGK" (bracelet, element, unlabeled) transform.at n=19A032237
- Number of partitions of n into parts 3k and 3k+1 with at least one part of each type.at n=45A035618
- a(n)=(s(n)+3)/10, where s(n)=n-th base 10 palindrome that starts with 7.at n=28A043086
- Numbers whose base-5 representation contains exactly three 1's and three 2's.at n=12A045232
- Discriminants of real quadratic fields with class number 1 and related continued fraction period length of 10.at n=21A050959
- Semiprimes p1*p2 such that p2 > p1 and p2 mod p1 = 8.at n=41A064906
- Column 2 of the array m(i,1)=m(1,j)=1 m(i,j)=m(i-1,j-1)+m(i-1,j+1) (a(n)=m(n,2)).at n=15A072100
- Number of conjugacy classes in the symmetric group S_n with distinct cardinality.at n=36A073906
- Numbers n such that 2^n+25229 is prime.at n=50A103148
- Numbers k such that k^3 contains a pandigital substring.at n=4A115933
- Maximum number of regions defined by n zigzag-lines in the plane when a zigzag-line is defined as consisting of two parallel infinite half-lines joined by a straight line segment.at n=40A117625
- Numbers n such that every digit occurs at least once in n^3.at n=22A119735
- Averages of four consecutive odd squares.at n=40A173960
- Least of 4 consecutive integers such that their product +-5 are primes.at n=39A174244
- Number of -n..n circular arrays x(0..4) of 5 elements with zero sums of x(i) and x(i)*x((i+1) mod 5).at n=38A202007
- a(1)=2, a(2)=3, for n >= 3, a(n) = 2*(gpf(a(n-1)) + gpf(a(n-2))) + 1, where gpf(n) is the greatest prime factor of n.at n=45A202211
- Number of nondecreasing -n..n vectors of length 3 whose dot product with some lexicographically greater than or equal to nondecreasing -n..n vector equals 3.at n=18A226424
- Smallest positive integer k (or 0 if no such k) with a primitive cycle of positive integers, exactly n of which are odd, under iteration by the Collatz-like 3x-k function.at n=28A226677