Properties of the Number 19042

Nineteen Thousand Forty-Two

Basics

Value: 19041 → 19042 → 19043

Parity: even

Prime: No

Previous Prime: 19037

Next Prime: 19051

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 9521

Divisors: 1, 2, 9521, 19042

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100101001100010

Octal: 45142

Duodecimal: B02A

Hexadecimal: 4a62

Square: 362597764

Square Root: 137.99275343292487

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

a(n) = prime(n)*prime(n-1) - 1. A23515

Even semiprimes of the form prime(n)*prime(n+1) - 1. A103533

Product of twin primes minus 1. A120875

(1/2)*A206803. A206804

Triangle read by rows: T(n,k) = number of n-element unlabeled connected N-free posets of height k (1 <= k <= n). A202178

Number of unlabeled rooted trees with n nodes such that the minimal outdegree of inner nodes equals 9. A244463

Triangle read by rows: T(n,k) = number of n-element unlabeled connected N-free posets of height k (2 <= k <= n). A202179

Semiprimes which are the product of a twin prime pair minus one. A269663

Number of (n+1) X 4 binary arrays with consecutive windows of two bits considered as a binary number nondecreasing in every row and column. A202330

Positive integers m such that none of the four consecutive numbers m, m+1, m+2, m+3 can be written as p² + q with p and q both prime. A258661