1950
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
- 1
Divisibility
- Divisor Count
- 24
- Divisor Sum
- 5208
- Proper Divisor Sum (Aliquot Sum)
- 3258
- Abundant Number
- yes
- Perfect Number
- no
- Deficient Number
- no
- Highly Composite
- no
- Weird Number
- no
- Untouchable Number
- no
- Primitive Abundant
- no
Derived Values
- Euler's Totient
- 480
- Möbius Function
- 0
- Radical
- 390
- Omega Function (Ω)
- 5
- Little Omega Function (ω)
- 4
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
- 143
- 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
- Largest number not the sum of distinct n-th-order polygonal numbers.at n=12A007419
- Coordination sequence T1 for Zeolite Code DOH.at n=27A008078
- Coordination sequence T1 for Zeolite Code PHI.at n=32A008227
- Coordination sequence T2 for Zeolite Code STI.at n=30A008235
- Orders of non-cyclic simple groups (divided by 4).at n=13A008976
- Coordination sequence T3 for Zeolite Code -CLO.at n=39A009852
- a(n) = floor( n*(n-1)*(n-2)/8 ).at n=26A011890
- a(n) = floor(n*(n-1)*(n-2)/9).at n=27A011891
- Expansion of 1/(1-x^4-x^5-x^6-x^7-x^8-x^9-x^10-x^11-x^12).at n=30A017834
- Numbers whose base-4 representation is the juxtaposition of two identical strings.at n=29A020332
- Numbers whose base-7 representation is the juxtaposition of two identical strings.at n=38A020335
- Numbers whose base-8 representation is the juxtaposition of two identical strings.at n=29A020336
- a(n) = n*(23*n + 1)/2.at n=13A022281
- a(n) = n*(27*n + 1)/2.at n=12A022285
- a(n) = floor(3rd elementary symmetric function of Sum_{j=1..k} 1/j, k = 1,2,...,n).at n=8A025213
- a(n) = (d(n)-r(n))/2, where d = A026054 and r is the periodic sequence with fundamental period (1,0,0,0).at n=23A026055
- 6 times triangular numbers: a(n) = 3*n*(n+1).at n=25A028896
- Numbers whose base-5 representation has 3 more 0's than 4's.at n=35A031473
- Numbers k whose decimal representation, read as a base-20 value and divided by k, yields an integer.at n=33A032571
- Numbers each of whose runs of digits in base 12 has length 2.at n=16A033010