14219
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 17
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 14520
- Proper Divisor Sum (Aliquot Sum)
- 301
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 13920
- Möbius Function
- 1
- Radical
- 14219
- 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
- 195
- 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
- Odd composite numbers which in base 2 contain their largest proper factor as a substring of digits.at n=26A063131
- Composite numbers not divisible by 2, 3, 5 or 7 which in base 2 contain their largest proper factor as a substring.at n=21A063138
- Composite numbers which in base 8 contain their largest proper factor as a substring.at n=3A063167
- Duplicate of A063167.at n=3A063878
- Number of partitions of the n-th decimal palindrome into distinct decimal palindromes.at n=41A091585
- Number of noncongruent integer-sided tetrahedra with largest side n.at n=13A097125
- Partial sums of A165271.at n=32A165273
- Let A(x) satisfy: A(x) = 1 + x*A(x)^(phi^2) where phi = (sqrt(5)+1)/2, then this sequence equals the integer part of the coefficients of A(x).at n=8A184786
- Record-breaking values, for increasing positive integers k == 1 or 5 mod 6, of the conjectured length of the longest primitive cycle(s) of positive integers under iteration by the Collatz-like 3x+k function.at n=29A226670
- Number of partitions of n into 9 parts such that every i-th smallest part (counted with multiplicity) is different from i.at n=17A244245
- Elliptic Carmichael numbers for the elliptic curve y^2 = x^3 + 80.at n=20A317174
- Prime generating polynomial: a(n) = (4*n - 29)^2 + 58.at n=36A320772
- Numbers that cannot be written as a difference of 11-smooth numbers.at n=16A326319
- Numbers k such that k![4] - 128 is prime, where k![4] = A007662(k) = quadruple factorial.at n=35A329176
- Natural numbers repeated 3 times are taken in parts of successive lengths 1,2,3,..., and a(n) is the sum of the numbers in the part with length n.at n=43A370880
- Number of distinct degree sequences among all simple graphs with n vertices whose degrees are consecutive integers.at n=13A382021