12698
domain: N
Properties
Digital Properties
- Digit Count
- 5
- Digit Sum
- 26
- Digital Root
- 8
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 4
Divisibility
- Divisor Count
- 8
- Divisor Sum
- 21792
- Proper Divisor Sum (Aliquot Sum)
- 9094
- Abundant Number
- no
- Perfect Number
- no
- Deficient Number
- yes
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 5436
- Möbius Function
- -1
- Radical
- 12698
- 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
- no
- Narcissistic Number
- no
- Collatz Steps
- 81
- 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
- yes
- Odd
- no
Appears in sequences
- a(n) = 6*n^2 + 2 for n > 0, a(0)=1.at n=46A005897
- a(0) = 1, a(n) = 24*n^2 + 2 for n>0.at n=23A010014
- Gaps of 7 in sequence A038593 (upper terms).at n=33A038654
- Numbers ending with '8' that are the difference of two positive cubes.at n=40A038863
- Double partial sums of (n * its dyadic valuation).at n=42A090889
- Number of increasing subsequences that can be made from the sequence of successive primes.at n=23A091956
- a(0)=1; a(n) = sigma_2(n) + sigma_3(n).at n=23A092344
- Smallest number that can be written in exactly n ways as a sum of distinct repdigits of its decimal digits.at n=38A131367
- Number of binary strings of length n with equal numbers of 0010 and 1100 substrings.at n=15A164172
- Number of n X 2 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and rows and columns lexicographically nondecreasing.at n=22A229439
- Number of unit cubes that have a side on the surface of a p X p X p cube composed of p^3 unit cubes, where p is the n-th prime.at n=14A261971
- Numbers k such that (206*10^k - 17)/9 is prime.at n=16A284427
- Number of cyclic binary sequences of length n containing no abelian 4th powers.at n=35A305594
- Number of widely totally normal compositions of n.at n=18A332279
- Number of integer partitions of n such that the maximum is less than twice the median.at n=49A361858