Properties of the Number 1320

One Thousand Three Hundred Twenty

Basics

Value: 1319 → 1320 → 1321

Parity: even

Prime: No

Previous Prime: 1319

Next Prime: 1321

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 2 ³ × 3 × 5 × 11

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 11, 12

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100101000

Octal: 2450

Duodecimal: 920

Hexadecimal: 528

Square: 1742400

Square Root: 36.3318042491699

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

Average of twin prime pairs. A14574

Integers written in factorial base. A7623

a(n) = n*(n-1)*(n-2) (or n!/(n-3)!). A7531

Number of (w,x,y) such that w,x,y are all in {0,...,n} and |w-x| = |x-y|. A212959

Triangle of denominators in Leibniz's Harmonic Triangle a(n,k), n >= 1, 1 <= k <= n. A3506

Numbers that are divisible by exactly 6 primes with multiplicity. A46306

Self-Fibonacci numbers: numbers k that divide Fibonacci(k). A23172

Stirling numbers of the first kind: s(n+2, n). A914

Euler's "numerus idoneus" (or "numeri idonei", or idoneal, or suitable, or convenient numbers). A926

Sums of twin prime pairs. A54735