1373
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
- 2
- Divisor Sum
- 1374
- Proper Divisor Sum (Aliquot Sum)
- 1
- 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
- 1372
- Möbius Function
- -1
- Radical
- 1373
- Omega Function (Ω)
- 1
- Little Omega Function (ω)
- 1
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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 127
- Smith Number
- no
- Vampire Number
- no
Primality
- Prime
- yes
- Composite Number
- no
- Semiprime
- no
- Squarefree Number
- yes
- Prime Power
- yes
- Prime Factorization
- no
- Twin Prime
- no
- Mersenne Prime
- no
- Sophie Germain Prime
- no
- Safe Prime
- no
- Powerful Number
- no
- Achilles Number
- no
- Prime Index
- 220
- Perfect Power
- no
- Smooth Number
- no
- Carmichael Number
- no
Classification
- Even
- no
- Odd
- yes
Appears in sequences
- Number of points of norm <= n^2 in square lattice.at n=21A000328
- Smallest natural number requiring n letters in English.at n=35A001166
- Number of letters in English name for n increases at these numbers.at n=26A001619
- Numbers divisible only by primes congruent to 1 mod 7.at n=37A004619
- Primes of form k^2 + 4.at n=10A005473
- Primes of the form k^2 + k + 41.at n=36A005846
- Discriminants of totally real cubic fields.at n=37A006832
- Smallest prime > n^2.at n=36A007491
- Coordination sequence T3 for Zeolite Code AEI.at n=28A008003
- Coordination sequence T6 for Zeolite Code BOG.at n=26A008054
- Coordination sequence T6 for Zeolite Code EUO.at n=23A008101
- Coordination sequence T1 for Zeolite Code FAU.at n=31A008105
- Coordination sequence T6 for Zeolite Code MFS.at n=23A008178
- Coordination sequence T2 for Zeolite Code TON.at n=23A008242
- Least m such that if a/b < c/d are Farey fractions of order n then there exists k such that a/b < k/m < c/d, k/m reduced.at n=42A009571
- Coordination sequence T2 for Zeolite Code AFX.at n=28A009865
- Numbers k such that the continued fraction for sqrt(k) has period 5.at n=35A010337
- Numbers in which every prefix (in base 10) is 1 or a prime.at n=43A012883
- Numbers such that every prefix and suffix is 1 or a prime.at n=24A012884
- Least d for which the number with continued fraction [n,n,n,n...] is in Q(sqrt(d)).at n=36A013946