Properties of the Number 19081

Nineteen Thousand Eighty-One

Basics

Value: 19080 → 19081 → 19082

Parity: odd

Prime: Yes

Previous Prime: 19079

Next Prime: 19087

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 19081

Divisors: 1, 19081

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100101010001001

Octal: 45211

Duodecimal: B061

Hexadecimal: 4a89

Square: 364084561

Square Root: 138.13399291991817

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

Lower triangular matrix, read by rows: T(i,j) = number of ways i seats can be occupied by any number k (0<=k<=j<=i) of persons. A86885

Row sums of unsigned triangle A062137 (generalized a=3 Laguerre). A62147

The 60-degree spoke (or ray) of a hexagonal spiral of Ulam. A244802

Triangle read by rows: ∑_j=0..k binomial(n, j)*binomial(k, j)*j!. A176120

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of e.g.f. exp(x/(1-x))/(1-x)^k. A293985

Consecutive states of the linear congruential pseudo-random number generator (419·s + 6173) mod 29282 when started at s=1. A385036

There appear to be at least n primes in the range (x-2·sqrt(x), x] for all x >= a(n). A189027

Primes p such that ∑_{k=PreviousPrime(p)..p} d(k) = ∑_{k=p..NextPrime(p)} d(k), where d(k) is the number of divisors function A000005. A353552

Primes p such that x¹⁸ = 2 has no solution mod p, but x⁶ = 2 has a solution mod p. A59664

Records in A134204. A133244