Properties of the Number 15842

Fifteen Thousand Eight Hundred Forty-Two

Basics

Value: 15841 → 15842 → 15843

Parity: even

Prime: No

Previous Prime: 15823

Next Prime: 15859

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 × 89 ²

Divisors: 1, 2, 89, 178, 7921, 15842

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11110111100010

Octal: 36742

Duodecimal: 9202

Hexadecimal: 3de2

Square: 250968964

Square Root: 125.86500705120545

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) = 2·prime(n)². A79704

2·p², for p an odd prime. A143928

T(n,k)=Half the number of (n+1)X(k+1) binary arrays with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one. A184614

a(n) = 2·Fibonacci(n)². A175395

T(n,k) = Number of n X k 0..1 arrays with no occurrence of three equal elements in a row horizontally, vertically or nw-to-se diagonally, and new values 0..1 introduced in row major order. A204197

Numbers such that the difference between the sum of the even divisors and the sum of the odd divisors is prime. A195382

5th-largest term in the n-th row of Stern's diatomic triangle A002487. A244475

Ramanujan's approximation to population of x² + y² <= 2ⁿ. A691

Number of partitions of n into parts with at most one part <= 2. A121659

Numbers k that divide A000201(k)^m for some integer m > 0, where A000201 is the lower Wythoff sequence. A185615