1469
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 20
- Digital Root
- 2
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 3
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1596
- Proper Divisor Sum (Aliquot Sum)
- 127
- 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
- 1344
- Möbius Function
- 1
- Radical
- 1469
- 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
- 47
- 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
- Number of partitions of n into at most 5 parts.at n=38A001401
- a(1) = 1; for n>1, a(n) = a(n-1) + 1 + sum of distinct prime factors of a(n-1) that are < a(n-1).at n=47A003508
- Convolution of A002024 with itself.at n=42A004797
- Number of walks on cubic lattice.at n=12A005570
- Positions of remoteness 6 in Beans-Don't-Talk.at n=33A005694
- Octahedral numbers: a(n) = n*(2*n^2 + 1)/3.at n=13A005900
- Expansion of (1+x^2)/((1-x)^2*(1-x^2)^2).at n=24A005993
- Coordination sequence T1 for Zeolite Code MTN.at n=23A008186
- Coordination sequence T2 for Zeolite Code PAU.at n=28A008220
- Coordination sequence T3 for Zeolite Code PAU.at n=28A008221
- Coordination sequence T1 for Zeolite Code -CLO.at n=34A009850
- Coordination sequence T4 for Zeolite Code TER.at n=26A016436
- Number of partitions of n into 5 unordered relatively prime parts.at n=38A023025
- Number of partitions of n into 6 unordered relatively prime parts.at n=32A023026
- Number of partitions of n in which the greatest part is 5.at n=43A026811
- Expansion of Molien series for 4-D extraspecial group 2^{1+2*2}.at n=25A030533
- Numbers k such that A030747(k)=4.at n=49A030756
- Squarefree m with no 4k+3 factors such that Pell equation x^2 - m*y^2 = -1 is insoluble.at n=36A031398
- Numbers of the form (q^2+(q+1)^2)*(r^2+(r+1)^2), q,r >= 1.at n=17A033682
- Decimal part of a(n)^(1/2) starts with n so that a(n)<a(n+1).at n=32A034067