1139
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1224
- Proper Divisor Sum (Aliquot Sum)
- 85
- 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
- 1056
- Möbius Function
- 1
- Radical
- 1139
- 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
- 57
- 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
- a(n) = 3*n^2 + 3*n - 1.at n=19A004538
- Related to representations as sums of Fibonacci numbers.at n=23A006133
- Minimum diameter of an integral set of n points in the plane, not all on a line.at n=43A007285
- Coordination sequence T3 for Zeolite Code MFS.at n=21A008175
- Composite but smallest prime factor >= 17.at n=33A008367
- Expansion of (1+x)/((1-x)*(1-x^2)*(1-x^3)*(1-x^4)).at n=39A008762
- a(n) = n^2 - floor( n/2 ).at n=34A014848
- Expansion of 1/(1-x^8-x^9-x^10-x^11-x^12-x^13-x^14-x^15-x^16-x^17).at n=48A017875
- Powers of cube root of 14 rounded to nearest integer.at n=8A018016
- Powers of cube root of 14 rounded up.at n=8A018017
- Number of solutions to c(1)*prime(4) + ... + c(n)*prime(n+3) = 1, where c(i) = +-1 for i>1, c(1) = 1.at n=18A022904
- Convolution of Lucas numbers and A000201.at n=9A023621
- Number of alternating compositions, i.e., compositions with alternating increases and decreases, starting with either an increase or a decrease.at n=16A025047
- Numbers that are the sum of 3 nonzero squares in exactly 9 ways.at n=17A025329
- Numbers that are the sum of 3 nonzero squares in 9 or more ways.at n=43A025337
- Numbers that are the sum of 3 distinct nonzero squares in exactly 7 ways.at n=36A025345
- Coordination sequence T1 for Zeolite Code SBT.at n=27A033612
- Base-2 digital convolution sequence.at n=34A033639
- a(n) = n*(4*n-1).at n=17A033991
- Numbers m with property that rotating digits of m right gives k*m + 1 for some k >= 1.at n=2A034180