7246
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 19
- Digital Root
- 1
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 10872
- Proper Divisor Sum (Aliquot Sum)
- 3626
- 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
- 3622
- Möbius Function
- 1
- Radical
- 7246
- 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
- 119
- 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
- yes
- Odd
- no
Appears in sequences
- Least m such that if r and s in {1/3, 1/6, 1/9, ..., 1/3n} satisfy r < s, then r < k/m < (k+1)/m < s for some integer k.at n=37A024838
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 84.at n=14A031582
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 62 ones.at n=3A031830
- Numbers k such that 2^k + 3^k is a semiprime.at n=28A050244
- Nearest integer to log(n^n)^(1 + log(1 + log(1 + n))).at n=16A062452
- Consecutive terms of A065966 which are also consecutive integers.at n=20A065976
- Centered heptagonal numbers.at n=45A069099
- Trajectory of n under the Reverse and Add! operation carried out in base 4 (presumably) does not reach a palindrome and (presumably) does not join the trajectory of any term m < n.at n=26A075421
- Least non-balanced x (i.e., not in A020492) such that sigma(p(n),x)/phi(x) is an integer, where p(n) = n-th prime.at n=41A078540
- a(n) = (27*n^2 + 9*n + 2)/2.at n=23A093485
- Number of square (0,1)-matrices with exactly n entries equal to 1 and no zero row or columns.at n=6A104602
- Number of partitions of n with unique smallest part and unique largest part.at n=40A117298
- Expansion of (1-4x+12x^2-16x^3+8x^4)/(1-x)^5.at n=21A119327
- Number of errors that occur when choosing n as modulus in French INSEE code (0<n<100).at n=4A137385
- Cubes (n * n * n) in carryless arithmetic mod 10.at n=36A169885
- Numbers k such that (2^k + 3^k)/13 is prime.at n=11A181628
- Total number of largest parts in all partitions of n that contain at least two distinct parts.at n=30A182629
- Semiprime centered triangular numbers.at n=28A184481
- 3rd term of continued fraction for sqrt(2)^sqrt(2)^...^sqrt(2) with n sqrt(2)'s.at n=22A198094
- Number of n X 2 0..1 arrays with rows and columns lexicographically nondecreasing and every element equal to at least one horizontal or vertical neighbor.at n=35A201347