7135
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 16
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 8568
- Proper Divisor Sum (Aliquot Sum)
- 1433
- 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
- 5704
- Möbius Function
- 1
- Radical
- 7135
- 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
- no
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 194
- 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
- Coefficients for step-by-step integration.at n=4A002402
- Positive numbers having the same set of digits in base 8 and base 10.at n=32A037442
- Sums of 11 distinct powers of 2.at n=27A038462
- Numbers whose base-4 representation contains exactly two 1's and four 3's.at n=32A045123
- Number of positions that are exactly n moves from the starting position in the Rashkey Type 1 puzzle.at n=8A079843
- a(n) = 4*n^2 + 10*n + 1.at n=41A082112
- Main diagonal of square array A082025.at n=45A082189
- Pierce expansion of 1/e^2.at n=8A091832
- Smaller of two consecutive lucky numbers with the same digital sum.at n=28A118566
- Row sums of triangle A120072 (numerator triangle for H atom spectrum).at n=26A120074
- Least k such that Sum_{i=n..k} 1/i >= n.at n=6A168214
- Partial sums of A023200.at n=28A172112
- (Average of twin balanced prime pairs)/10.at n=23A173893
- Number of disconnected 3-regular simple graphs on 2n vertices with girth at least 5.at n=15A185235
- Number of partitions of n in which any two parts differ by at most 6.at n=40A218508
- Composite squarefree numbers n such that p + tau(n) divides n - phi(n), where p are the prime factors of n, tau(n) = A000005(n) and phi(n) = A000010(n).at n=38A229324
- Triangle read by rows: coefficients for corrector y(x_0) for step-by-step integration.at n=16A260781
- Triangle read by rows: T(n,k) (n>=1, 0<=k<n) is the number of permutations of n with maximal difference k between elements in the same cycle.at n=48A263757
- The Pnictogen sequence: a(n) = A018227(n)-3.at n=31A271995
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 505", based on the 5-celled von Neumann neighborhood.at n=20A272583