Properties of the Number 1318

One Thousand Three Hundred Eighteen

Basics

Value: 1317 → 1318 → 1319

Parity: even

Prime: No

Previous Prime: 1307

Next Prime: 1319

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 659

Divisors: 1, 2, 659, 1318

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100100110

Octal: 2446

Duodecimal: 91A

Hexadecimal: 526

Square: 1737124

Square Root: 36.30426972134269

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

Describe n. Also called the "Say What You See" or "Look and Say" sequence LS(n). A45918

Number of partitions of n into odd parts greater than 1. A87897

Numbers k such that k⁵¹² + 1 is prime. A57465

Describe n (count digits in order of increasing value, ignoring missing digits). A47842

Triangle read by rows: T(n,k) = number of connected multigraphs with n >= 0 edges and 1 <= k <= n+1 vertices, with no loops allowed. A191646

a(1) = 1; thereafter a(n+1) = a(n) + product of nonzero digits of a(n). A63108

Number of partitions of n whose median is not a part. A238479

Semiprimes of form prime - 1. A77065

Semiprimes with prime sum of factors: twice the lesser of the twin prime pairs. A108605

Number of integer partitions of n whose Heinz number (product of primes of parts) is divisible by their sum of primes of parts. A330953