Properties of the Number 21498

Twenty-One Thousand Four Hundred Ninety-Eight

Basics

Value: 21497 → 21498 → 21499

Parity: even

Prime: No

Previous Prime: 21493

Next Prime: 21499

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 3583

Divisors: 1, 2, 3, 6, 3583, 7166, 10749, 21498

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001111111010

Octal: 51772

Duodecimal: 10536

Hexadecimal: 53fa

Square: 462164004

Square Root: 146.6219628841464

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

Triangle read by rows: T(n,k) number of ways of partitioning the (n+5)-element multiset {1,1,1,1,1,1,2,3,...,n} into exactly k nonempty parts, n >= 0 and 1 <= k <= n + 5. A291120

a(n) = [x^prime(n)] ∏_k=1..n (x^prime(k) + 1 + 1/x^prime(k)). A369390

Integers n where n³ + (n+1)³ is a Taxicab number A001235. A259836

Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2) + 2, where a(0) = 1, a(1) = 2, b(0) = 3. A294534

Sum of the squares of the number of parts in all partitions of n. A296010

1/(Integral_x=0..1 x^{x^(xⁿ}) dx - 1/2), rounded to the nearest integer. A322009

Low-temperature partition function expansion for hexagonal lattice (Potts model, q=3). A57385

Number of ways of placing kings with no more than 2 mutual attacks on an n X n chessboard symmetric about both diagonal and antidiagonal. A143879

Invariants for a hidden action of S_n+1 on Cayley trees with n vertices. A115868

Decimal expansion of 1/494. A21498