Properties of the Number 19285

Nineteen Thousand Two Hundred Eighty-Five

Basics

Value: 19284 → 19285 → 19286

Parity: odd

Prime: No

Previous Prime: 19273

Next Prime: 19289

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 × 7 × 19 × 29

Divisors: 1, 5, 7, 19, 29, 35, 95, 133, 145, 203

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100101101010101

Octal: 45525

Duodecimal: B1B1

Hexadecimal: 4b55

Square: 371911225

Square Root: 138.87044321957066

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

4-dimensional pyramidal numbers: a(n) = (3·n+1)*binomial(n+2, 3)/4. Also Stirling2(n+2, n). A1296

Triangle of q-binomial coefficients for q=-12. A15125

a(n) is the smallest k such that the sum of the first k terms of the composite-harmonic series, ∑_j=1..k 1/(j-th composite), is > n. A74631

Numbers k such that 2^k + 29 is prime. A156982

Number of nonnegative lattice paths from (0,0) to (n,0) where the allowed steps at (x,y) are (1,v) with v in {-1,0,...,max(y,1)}. A333105

Odd numbers producing 4 odd numbers in the Collatz iteration. A198587

Triangle read by rows: The Bell transform of the quartic factorial numbers (A007696). A265606

a(n) = (1/720)*n*(n - 10)*(n - 1)*(n³ - 34·n² + 181·n - 144). A319932

Gaussian binomial coefficient [ n,2 ] for q = -12. A15264

T(n, k) = [x^k] n! [tⁿ] 1/(exp((V*(2 + V))/(4·t))*sqrt(1 + V)) where V = W(-2·t*x) and W denotes the Lambert function. Table read by rows, T(n, k) for 0 <= k <= n. A343805