1244
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 11
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 6
- Divisor Sum
- 2184
- Proper Divisor Sum (Aliquot Sum)
- 940
- 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
- 620
- Möbius Function
- 0
- Radical
- 622
- Omega Function (Ω)
- 3
- 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
- 88
- 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
- Coefficients of the 3rd-order mock theta function f(q).at n=59A000025
- Coefficient of q^(2n-1) in the series expansion of Ramanujan's mock theta function f(q).at n=29A000199
- Primes multiplied by 4.at n=63A001749
- Squares written in base 8.at n=25A002441
- Numbers that are the sum of 12 positive 6th powers.at n=21A003368
- Primes written in base 5.at n=45A004679
- Related to representations as sums of Fibonacci numbers.at n=29A006133
- Numbers not of form p + 2^x + 2^y.at n=25A006286
- a(n) = Sum_{k=1..n-1} (k OR n-k).at n=38A006583
- Coordination sequence T5 for Zeolite Code DDR.at n=22A008075
- Coordination sequence T1 for Zeolite Code EMT.at n=29A008086
- Coordination sequence T2 for Zeolite Code STI.at n=24A008235
- Coordination sequence T2 for Zeolite Code CON.at n=25A009869
- Phi(n) + 5 | sigma(n + 5).at n=21A015784
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite STI = Stilbite Na4Ca8[Al20Si52O144].56H2O starting with a T4 atom.at n=10A019239
- Numbers k such that the continued fraction for sqrt(k) has period 28.at n=15A020367
- Fibonacci sequence beginning 1, 22.at n=10A022392
- a(n) = [ a(n-1)/a(1) ] + [ a(n-3)/a(3) ] + [ a(n-5)/a(5) ] + ..., for n >= 3.at n=30A022872
- a(n) = a(n-1) + c(n-1) for n >= 2, a( ) increasing, given a(1)=5; where c( ) is complement of a( ).at n=44A022937
- Numbers with exactly 3 4's in base 5 expansion.at n=27A023740