12022
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 7
- Digital Root
- 7
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 18036
- Proper Divisor Sum (Aliquot Sum)
- 6014
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 6010
- Möbius Function
- 1
- Radical
- 12022
- 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
- 42
- 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
- Number of degenerate fanout-free Boolean functions of n variables using And, Or, Xor, and Not gates.at n=5A005738
- Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 64 ones.at n=24A031832
- Numbers having three 2's in base 10.at n=38A043499
- Coefficients of monic primitive irreducible polynomials over GF(4) listed in lexicographic order.at n=37A058952
- Least k such that k*10^n+1, k*10^n+3, k*10^n+7 and k*10^n+9 are all prime.at n=7A064281
- Numbers n such that 10000000n+1, 10000000n+3, 10000000n+7, 10000000n+9 are all primes.at n=0A064966
- Numbers in base -3.at n=23A073785
- Number of partitions of n with at most 2 odd parts.at n=46A100835
- Quaternary emirpimes.at n=35A114015
- Number of partitions of n with at most 3 odd parts.at n=46A114312
- Numbers k such that phi(k) + prime(k) is a triangular number.at n=37A115908
- Templates for lunar primes in any base (version 1).at n=11A171750
- Numbers 3*n + 2 written in base 3.at n=47A190642
- Templates for lunar primes in any base (version 3).at n=8A191420
- Number of trapezoidal words of length n.at n=42A260881
- Number of nX1 0..1 arrays with no 1 equal to more than one of its king-move neighbors, with the exception of exactly two elements.at n=15A282831
- Number of quadrilateral regions into which a figure made up of a row of n adjacent congruent rectangles is divided upon drawing diagonals of all possible rectangles.at n=18A324043
- Number of integer partitions of n such that every pair of distinct parts has a different product.at n=35A325856
- a(n) is the number of sparse rulers of length n where the length of the first segment is unique.at n=17A331330
- Number of integer partitions of 2n with reverse-alternating sum -2.at n=25A344741