13254
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
- 2
Divisibility
- Divisor Count
- 12
- Divisor Sum
- 27084
- Proper Divisor Sum (Aliquot Sum)
- 13830
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 4324
- Möbius Function
- 0
- Radical
- 282
- Omega Function (Ω)
- 4
- Little Omega Function (ω)
- 3
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
- 94
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- Squarefree Number
- no
- 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
- Aliquot sequence starting at 138.at n=12A008888
- Aliquot sequence starting at 150.at n=11A008889
- Aliquot sequence starting at 168.at n=9A008890
- Positive numbers k such that k and 3*k are anagrams in base 7 (written in base 7).at n=18A023069
- Decimal representation of permutations of lengths 1, 2, 3, ... arranged lexicographically.at n=40A030299
- 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 76.at n=30A031574
- Schoenheim bound L_1(n,5,4).at n=32A036832
- Denominators of continued fraction convergents to sqrt(478).at n=10A041913
- usigma(n) = 2n + d(n), where d(n) is the number of divisors of n.at n=13A063829
- Composite numbers k+1 such that k*phi(k+1) is a perfect square.at n=21A069068
- Triangle read by rows: T(n,k) is the number of k-matchings in the P_3 X P_n lattice graph.at n=41A100245
- Numbers with 5 distinct digits {1,2,3,4,5} such that all adjacent digits (as well as first and last digits) are coprime.at n=4A104972
- a(n+1) = a(n) + (if a(n) is odd then (next odd square) else (next even square)), a(0) = 1.at n=22A116955
- Ulam's spiral (ESE spoke).at n=29A143855
- Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.at n=7A150822
- Permutations of 12345: Numbers having each of the decimal digits 1,...,5 exactly once, and no other digit.at n=7A178475
- (1, 4, 7, 10, 13, ...) convolved with (1, 0, 4, 7, 10, 13, ...); given A016777 = (1, 4, 7, 10, 13, ...).at n=21A179905
- Lower Wythoff values for sequence A185615(n).at n=22A185616
- Denominator of the rationals obtained from the e.g.f. D(1,x), a Debye function.at n=46A227540
- Number of (n+1) X (3+1) 0..2 arrays with no element equal to all horizontal neighbors or unequal to all vertical neighbors, and new values 0..2 introduced in row major order.at n=4A239532