Properties of the Number 23861

Twenty-Three Thousand Eight Hundred Sixty-One

Basics

Value: 23860 → 23861 → 23862

Parity: odd

Prime: No

Previous Prime: 23857

Next Prime: 23869

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 107 × 223

Divisors: 1, 107, 223, 23861

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101110100110101

Octal: 56465

Duodecimal: 11985

Hexadecimal: 5d35

Square: 569347321

Square Root: 154.47006182429007

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

Positive integers k such that (k+1)⁴ has a divisor congruent to -1 modulo k. A350916

a(0) = 5, a(1) = 5, and a(n) = 4·a(n-1) - a(n-2) - 4 for n >= 2. A350920

Number of nX2 0..1 arrays with every element unequal to 0, 1, 3, 4 or 5 king-move adjacent elements, with upper left element zero. A304349

Real part of ∑_k=0..n (k + i^k)², where i=sqrt(-1). A236377

Number of n-node rooted trees in which four equals the maximal number of nodes in paths starting at a leaf and ending at the first branching node or at the root. A318900

Row sums of triangle A131819. A131820

a(n) = (5·n)!/((2·n)!*(n!)³). A1460

a(n) = 1·t(n) + 2·t(n-1) + ... + k·t(n+1-k), where k=floor((n+1)/2) and t = A000032 (Lucas numbers). A23861