Properties of the Number 11865

Eleven Thousand Eight Hundred Sixty-Five

Basics

Value: 11864 → 11865 → 11866

Parity: odd

Prime: No

Previous Prime: 11863

Next Prime: 11867

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 7 × 113

Divisors: 1, 3, 5, 7, 15, 21, 35, 105, 113, 339

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10111001011001

Octal: 27131

Duodecimal: 6A49

Hexadecimal: 2e59

Square: 140778225

Square Root: 108.92658077806354

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Expansion of (1 + x)/(1 + x + 3·x²). A110523

Number of partitions p of n such that (maximal multiplicity of the parts of p) > (number of distinct parts of p). A240309

a(n) = dot_product(1,2,...,n)*(7,8,...,n,1,2,3,4,5,6). A26049

Odd composite integers m such that A086902(2·m-J(m,53)) == 7·J(m,53) (mod m), where J(m,53) is the Jacobi symbol. A339520

Number of integer partitions of n with parts colored by {0, 1, 2} such that the sum of colors is congruent to 0 (mod 3). A389343

Odd terms of A059756. A111042

Numbers k such that 27·k+1 is a square. A219258

Numbers n such that φ(n) + φ(n+1) = σ(n)/2. A76647

a(1)=4. a(n) = a(n-1) + n, if a(n-1)+n is composite. Otherwise a(n) = a(n-1)*n. A175459

Record values in A243145. A299112