Properties of the Number 21270

Twenty-One Thousand Two Hundred Seventy

Basics

Value: 21269 → 21270 → 21271

Parity: even

Prime: No

Previous Prime: 21269

Next Prime: 21277

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 5 × 709

Divisors: 1, 2, 3, 5, 6, 10, 15, 30, 709, 1418

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101001100010110

Octal: 51426

Duodecimal: 10386

Hexadecimal: 5316

Square: 452412900

Square Root: 145.84238067173752

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 g.f. (1 + x + 2·x²)/((1 - x)³*(1 - x³)). A92498

Numbers k with the property that p = k² - 11 and q = k² + 11 are consecutive primes. A248790

Numbers k such that Bernoulli number B_k has denominator 14322. A295588

Number of partitions of n into at most 6 parts. A1402

Coefficient of x⁰ in the minimal polynomial of the continued fraction [1ⁿ,sqrt(2)+sqrt(3),1,1,...], where 1ⁿ means n ones. A266803

T(n,k) = number of ways to arrange k points on an n X n X n triangular grid so that it balances at its center. A194016

Decimal expansion of 1/266. A21270