Properties of the Number 6447

Six Thousand Four Hundred Forty-Seven

Basics

Value: 6446 → 6447 → 6448

Parity: odd

Prime: No

Previous Prime: 6427

Next Prime: 6449

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 7 × 307

Divisors: 1, 3, 7, 21, 307, 921, 2149, 6447

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100100101111

Octal: 14457

Duodecimal: 3893

Hexadecimal: 192f

Square: 41563809

Square Root: 80.2932126645833

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

Generalized 30-gonal (or triacontagonal) numbers: m*(14·m - 13) with m = 0, +1, -1, +2, -2, +3, -3, ... A316729

Triangle T(n, k, j) = T(n-1, k, j) + T(n-1, k-1, j) + (2·j + 1)*prime(j)*T(n-2, k-1, j) with T(2, k, j) = prime(j) and j = 7, read by rows. A153652

Numbers k such that k³ divides 20^k² + 1. A177820

Number of ways to write n as an ordered sum of 7 squarefree numbers. A341067

Number of non-isomorphic multiset partitions of weight n with at most 2 distinct vertices, or with at most 2 (not necessarily distinct) edges. A323655

Mixed partitions of n. A2096

Triangle T, read by rows, that satisfies: T(n,k) = [T³](n-1,k) for n>k+1>=1, with T(n,n) = 1 and T(n+1,n) = n+1 for n>=0, where T³ is the matrix cube of T. A109282

Column 0 of triangle A109282. A109283

Expansion of ∏_k>=1 (1 + 3·x^k)^k. A266857

Odd composite integers m such that A001906(m)² == 1 (mod m). A338007