365
domain: N
Properties
Digital Properties
- Digit Count
- 3
- Digit Sum
- 14
- Digital Root
- 5
- Palindromic Number
- no
- Repdigit
- no
- Automorphic
- no
- Kaprekar Number
- no
- Multiplicative Persistence
- 2
Divisibility
- Divisor Count
- 4
- Divisor Sum
- 444
- Proper Divisor Sum (Aliquot Sum)
- 79
- 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
- 288
- Möbius Function
- 1
- Radical
- 365
- 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
- yes
- Harshad Number
- no
- Narcissistic Number
- no
- Collatz Steps
- 94
- Smith 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
Names
- German
- dreihundertfünfundsechzig· ordinal: dreihundertfünfundsechzigste
- English
- three hundred sixty-five· ordinal: three hundred sixty-fifth
- Spanish
- trescientos sesenta y cinco· ordinal: 365º
- French
- trois cent soixante-cinq· ordinal: trois cent soixante-cinqième
- Italian
- trecentosessantacinque· ordinal: 365º
- Latin
- trecenti sexaginta quinque· ordinal: 365.
- Portuguese
- trezentos e sessenta e cinco· ordinal: 365º
Appears in sequences
- Number of partitions of n if there are two kinds of 1's and two kinds of 2's.at n=11A000097
- A nonlinear binomial sum.at n=10A000126
- Numbers m such that Fibonacci(m) ends with m.at n=17A000350
- Tenth column of quintinomial coefficients.at n=2A000575
- Number of nonnegative solutions to x^2 + y^2 <= n^2.at n=21A000603
- a(n) = ceiling(n^2/2).at n=27A000982
- Related to series-parallel networks.at n=9A001572
- Primes multiplied by 5.at n=20A001750
- Centered square numbers: a(n) = 2*n*(n+1)+1. Sums of two consecutive squares. Also, consider all Pythagorean triples (X, Y, Z=Y+1) ordered by increasing Z; then sequence gives Z values.at n=13A001844
- Nearest integer to n^2/8.at n=54A001971
- Number of integral points in a certain sequence of open quadrilaterals.at n=30A002578
- a(n) = Sum_{d|n, d <= 4} d^2 + 4*Sum_{d|n, d>4} d.at n=49A002791
- Number of rooted trees with n nodes and omega-valency 1.at n=9A003120
- Divisors of 2^36 - 1.at n=39A003543
- Discriminants of quadratic fields whose fundamental unit has norm -1.at n=45A003653
- a(1)=a(2)=1, a(n+1) = (a(n)^3 +1)/a(n-1).at n=4A003818
- Numbers that are divisible only by primes congruent to 1 mod 4.at n=48A004613
- Numbers of the form 8k+5; or, numbers whose binary expansion ends in 101.at n=45A004770
- a(n) = floor(n*phi^5), where phi is the golden ratio, A001622.at n=33A004920
- a(n)=least number m such that m-a(n-1)<>a(j)-a(k) for all j,k less than m; a(1)=1, a(2)=3.at n=19A004979