Properties of the Number 15490

Fifteen Thousand Four Hundred Ninety

Basics

Value: 15489 → 15490 → 15491

Parity: even

Prime: No

Previous Prime: 15473

Next Prime: 15493

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 × 5 × 1549

Divisors: 1, 2, 5, 10, 1549, 3098, 7745, 15490

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110010000010

Octal: 36202

Duodecimal: 8B6A

Hexadecimal: 3c82

Square: 239940100

Square Root: 124.45882853377658

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

Coordination sequence for body-centered tetragonal lattice. A8527

T(n,k)=Half the number of 0..k arrays of length n+2 with second differences nonzero. A212782

G.f. A(x) satisfies A(x) = 1 + x·A(x)⁴ / (1 - x·A(x)). A364747

a(0) = 1, a(n) = 32·n² + 2 for n > 0. A10021

Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(0,k) = 1 and T(n,k) = (1/n) * ∑_j=1..n binomial(n,j) * binomial(n+(k-1)*j,j-1) for n > 0. A336706

Number of A095314-primes in range ]2ⁿ,2ⁿ⁺¹]. A95334

Numbers k such that (3^k - 7)/2 is prime. A63679

a(n) = (2·n-1)² + (2·n+1)². A108100

Number of A095318-primes in range ]2ⁿ,2ⁿ⁺¹]. A95328

a(n) = a(n-2) + 2·a(n-3) for n >= 3, where a(0) = 2, a(2) = 4, a(3) = 5. A288668