Properties of the Number 3865

Three Thousand Eight Hundred Sixty-Five

Basics

Value: 3864 → 3865 → 3866

Parity: odd

Prime: No

Previous Prime: 3863

Next Prime: 3877

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 5 × 773

Divisors: 1, 5, 773, 3865

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

603 Try Today's Challenge

Representations

Binary: 111100011001

Octal: 7431

Duodecimal: 22A1

Hexadecimal: f19

Square: 14938225

Square Root: 62.16912416947821

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

Numbers k such that k, k+1 and k+2 are products of two primes. A56809

Expansion of e.g.f. exp(x·cosh(x)). A3727

Smallest of three consecutive squarefree numbers k, k+1, k+2 of the form p·q where p and q are distinct primes. A39833

Ordered hypotenuses of primitive Pythagorean triangles having legs that add up to a square. A88319

a(n) = 2·n² + 8·n + 1. A161532

Table T(n,k) by antidiagonals. T(n,k) is the number of primitive (=aperiodic) k-ary words with length less than or equal to n (n,k >= 1). A143326

Number of starting positions of Nim with 2n pieces such that 2nd player wins. Partitions of 2n such that xor-sum of partitions is 0. A48833

Number of n-leaf binary trees that do not contain (()((((()())())())())) as a subtree. A159772

Centered 14-gonal numbers. A69127

a(n) = [xⁿ] (1 + x + x³ + x⁴)ⁿ. A228960