1401
domain: N
Properties
Digital Properties
- Digit Count
- 4
- Digit Sum
- 6
- Digital Root
- 6
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 1
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 1872
- Proper Divisor Sum (Aliquot Sum)
- 471
- 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
- 932
- Möbius Function
- 1
- Radical
- 1401
- 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
- 96
- 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
- Squares written in base 6.at n=19A001741
- a(n) = least integer m > a(n-1) such that m - a(n-1) != a(j) - a(k) for all j, k less than n; a(1) = 1, a(2) = 2.at n=36A004978
- Numbers k such that k, k+1 and k+2 have the same number of divisors.at n=28A005238
- Coordination sequence T1 for Zeolite Code FER.at n=23A008106
- Pisot sequence E(7,15), a(n)=[ a(n-1)^2/a(n-2)+1/2 ].at n=7A014001
- Quadruples of different integers from [ 2,n ] with no common factors between triples.at n=16A015629
- Cycle class sequence c(n) (the number of true cycles of length n in which a certain node is included) for zeolite CON = CIT-1 H2[B2Si54O112] starting with a T1 atom.at n=10A019098
- Numbers k such that the continued fraction for sqrt(k) has period 40.at n=6A020379
- a(n) = a(n-1) + c(n-1) for n >= 2, a( ) increasing, given a(1)=4; where c( ) is complement of a( ).at n=47A022936
- Numbers k such that Fibonacci(k) == -2 (mod k).at n=23A023163
- Convolution of composite numbers and odd numbers.at n=11A023650
- Position of 2*n^2 in A000404 (sums of 2 nonzero squares).at n=49A024517
- Number of partitions of n into an even number of parts, the least being 5; also, a(n+5) = number of partitions of n into an odd number of parts, each >=5.at n=60A027197
- Positions of record values in A030737.at n=35A030742
- Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 24.at n=12A031522
- Lucky numbers with size of gaps equal to 16 (lower terms).at n=1A031898
- Numbers with exactly five distinct base-6 digits.at n=4A031983
- "AFJ" (ordered, size, labeled) transform of 2,1,1,1,...at n=7A032001
- Lucky numbers ending with digit 1.at n=45A032585
- a(1) = 1; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime.at n=24A033680