5235
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 15
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 8400
- Proper Divisor Sum (Aliquot Sum)
- 3165
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 2784
- Möbius Function
- -1
- Radical
- 5235
- Omega Function (Ω)
- 3
- 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
- yes
- Narcissistic Number
- no
- Collatz Steps
- 85
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- no
- Composite Number
- yes
- Semiprime
- no
- 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
- Increasing blocks of digits of e.at n=7A001114
- Lucky numbers with size of gaps equal to 18 (lower terms).at n=27A031900
- Denominators of continued fraction convergents to sqrt(934).at n=8A042807
- Numbers n such that 105*2^n-1 is prime.at n=26A050578
- Numbers k such that 189*2^k-1 is prime.at n=31A050846
- Positive numbers whose product of digits is 10 times their sum.at n=23A062043
- a(n+1) = 2a(n)-a([n/2]) starting with a(0)=0 and a(1)=1.at n=15A062178
- Numbers k such that k and its reversal are both multiples of 15.at n=22A062905
- Non-palindromic number and its reversal are both multiples of 15.at n=17A062914
- Interprimes which are of the form s*prime, s=15.at n=26A075290
- Numbers n such that A068340(n) = +-1.at n=6A076542
- Consider the family of directed multigraphs enriched by the species of derangements. Sequence gives number of those multigraphs with n labeled loops and arcs.at n=6A098626
- Numbers k such that pi(k).pi(k-1) ... pi(3).pi(2) is prime (dot between numbers means concatenation).at n=5A099078
- Table read by antidiagonals: T(n,k) = number of labeled partitions of (n,k) into pairs (i,j).at n=41A108470
- Table read by antidiagonals: T(n,k) = number of labeled partitions of (n,k) into pairs (i,j).at n=39A108470
- Column 11 of table A105552.at n=16A110554
- Start with 1 and repeatedly reverse the digits and add 64 to get the next term.at n=32A118159
- Start with 1 and repeatedly reverse the digits and add 76 to get the next term.at n=44A118226
- Smaller of two consecutive lucky numbers with the same digital sum.at n=17A118566
- Lucky numbers with only prime digits.at n=41A118718