Properties of the Number 11505

Eleven Thousand Five Hundred Five

Basics

Value: 11504 → 11505 → 11506

Parity: odd

Prime: No

Previous Prime: 11503

Next Prime: 11519

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 13 × 59

Divisors: 1, 3, 5, 13, 15, 39, 59, 65, 177, 195

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10110011110001

Octal: 26361

Duodecimal: 67A9

Hexadecimal: 2cf1

Square: 132365025

Square Root: 107.26136303441235

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

Triangular array that counts rooted polyominoes. A38622

a(n) = (2·n-1)*(n² -n +6)/6. A49480

Numbers k such that σ(k) = σ(k+11). A15881

a(n) = ∑_k=1..n lcm(k,n)/gcd(k,n). A56789

Integers that need 10 iterations of the map x->A352172(x) to reach 1. A352268

Numbers k such that 2·k+1, 4·k+1, 8·k+1 and 16·k+1 are primes. A124412

For 1<=x<=n, 1<=y<=n, write gcd(x,y) = u·x+v·y with u,v minimal; a(n) = sum of the values of u²+v². A345434

Number of compact-rooted directed animals of size n having 3 source points. A5775

Numbers k such that 2k+1, 4k+1, 6k+1 and 8k+1 are primes. A124409

This is to A139025 as A139025 to A014688, see A139025 for details. A139026