14207
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 2
- Divisor Sum
- 14208
- Proper Divisor Sum (Aliquot Sum)
- 1
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 14206
- Möbius Function
- -1
- Radical
- 14207
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- 151
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- yes
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 1671
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Sums of 12 distinct powers of 2.at n=28A038463
- Denominators of continued fraction convergents to sqrt(918).at n=7A042775
- Primes p such that there is no Carmichael number pqr, p<q<r q, r primes.at n=16A051663
- Safe primes (A005385) (p and (p-1)/2 are primes) such that 6*p+1 is also prime.at n=44A075705
- Safe primes (A005385) (p and (p-1)/2 are primes) such that 8*p+1 (A023228) is also prime.at n=35A075706
- Fractional part of 1/(1-tanh(n)) decreases monotonically to zero.at n=11A079040
- a(n) = sum of the first n upper twin primes.at n=36A086168
- Primes that do not divide any term of the Lucas 4-step sequence A073817.at n=14A106300
- Primes congruent to 21 mod 41.at n=35A142218
- Primes congruent to 13 mod 47.at n=34A142364
- Primes congruent to 46 mod 49.at n=38A142453
- Primes congruent to 3 mod 53.at n=36A142533
- Primes congruent to 47 mod 59.at n=29A142774
- Primes congruent to 55 mod 61.at n=28A142853
- Numbers k such that the string k modulo 1000 is found at position k in the decimal digits of Pi.at n=37A153226
- Primes p such that p^3 - 24 and p^3 + 24 are also primes.at n=26A153323
- Prime numbers where the last digit is the sum of all the previous digits.at n=24A156617
- Primes of the form 100*k+7.at n=42A166547
- Coefficient of x in the reduction by x^2 -> x+1 of the polynomial p(n,x) defined at Comments.at n=16A192965
- Numbers m such that m, m-1, m-2 and m-3 are 1,2,3,4-almost primes respectively.at n=26A201220