Properties of the Number 2845

Two Thousand Eight Hundred Forty-Five

Basics

Value: 2844 → 2845 → 2846

Parity: odd

Prime: No

Previous Prime: 2843

Next Prime: 2851

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 569

Divisors: 1, 5, 569, 2845

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 101100011101

Octal: 5435

Duodecimal: 1791

Hexadecimal: b1d

Square: 8094025

Square Root: 53.33854141237835

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

Coordination sequence for "tea" 3D uniform tiling. A299285

Composite and every divisor (except 1) contains the digit 5. A62672

Numbers k such that k!! + 2⁶ is prime. A76193

a(n) = ceiling( ∑_i=1..n-1 a(i)/7 ), a(1) = 1. A120186

Expansion of ∏_k>=1 B(x^k), where B(x) is the g.f. of A003823. A327716

Sum of squares of first n positive integers congruent to 1 mod 3. A24215

Numbers k such that binomial(5k, k) + 1 is prime. A125243

Least positive integer k with prime(k)²-2 and prime(prime(k))²-2 both prime such that prime(k·n)²-2 and prime(prime(k·n))²-2 are all prime. A261281

Odd semiprimes p·q, such that Stern polynomial B(p·q,x) is a product of B(p,x) and B(q,x). A391256

Triangle read by rows, related to Pascal's triangle, starting with 1, 0, 0. A91562