Properties of the Number 3845

Three Thousand Eight Hundred Forty-Five

Basics

Value: 3844 → 3845 → 3846

Parity: odd

Prime: No

Previous Prime: 3833

Next Prime: 3847

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 769

Divisors: 1, 5, 769, 3845

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111100000101

Octal: 7405

Duodecimal: 2285

Hexadecimal: f05

Square: 14784025

Square Root: 62.00806399170998

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) = 4·n² + 1. A53755

Array read by antidiagonals downwards: T(b,n) = number of words of length n over an alphabet of size b that are in standard order. A278984

Word structures of length n using a 5-ary alphabet. A56272

Semiprimes of the form k²+1. A144255

Composite numbers of the form k² + 1. A134406

T(n,k) = number of n X k 0..5 arrays with values 0..5 introduced in row major order and no element equal to any horizontal or vertical neighbor. A198982

Smallest palindromic number of 3 digits in two bases differing by n. A216840

Number of 3's in all partitions of n. A24787

a(n) is the greatest k such that A307730(k) = n. A348409

Triangle of partial sums of Stirling numbers of 2nd kind (A008277): T(n,k) = ∑_i=1..k Stirling2(n,i), 1<=k<=n. A102661