16053
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 21408
- Proper Divisor Sum (Aliquot Sum)
- 5355
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 10700
- Möbius Function
- 1
- Radical
- 16053
- 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
- 45
- 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
- Numbers k that divide the (left) concatenation of all numbers <= k written in base 7 (most significant digit on left).at n=10A029476
- 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=34A031582
- Denominators of continued fraction convergents to sqrt(382).at n=10A041725
- Smallest semiprime such that n primes will follow until the next semiprime.at n=6A088701
- a(n) is the smallest semiprime such that difference between a(n) and next semiprime, b(n), is n.at n=24A131109
- a(n) = least member of A006881 whose difference from the following one equals n, or 0 if no such semiprime exists.at n=24A140784
- Number of 2 X 2 matrices having all terms in {1,...,n} and determinant in the closed interval [0,n].at n=20A211057
- Least semiprime m such that the next semiprime is m + A215231(n).at n=10A215232
- a(n) is the smallest semiprime followed by gap (to the next semiprime) equal to n-th semiprime.at n=8A278349
- Floor of area of quadrilateral with consecutive prime sides configured as a cyclic quadrilateral.at n=29A329950
- Number of integer partitions of n whose first differences (assuming the last part is zero) are not unimodal.at n=36A332284
- Binomial transform of A371460.at n=5A371984