Properties of the Number 7745

Seven Thousand Seven Hundred Forty-Five

Basics

Value: 7744 → 7745 → 7746

Parity: odd

Prime: No

Previous Prime: 7741

Next Prime: 7753

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 1549

Divisors: 1, 5, 1549, 7745

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 1111001000001

Octal: 17101

Duodecimal: 4595

Hexadecimal: 1e41

Square: 59985025

Square Root: 88.0056816347672

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) = 6ⁿ - 2ⁿ + 1. A155597

Semiprimes of the form k²+1. A144255

Number of compositions of n with all adjacent parts (x, y) satisfying x > 2y or y > 2x. A342332

a(n) = 7^n-5 * (n+1)^n-7 * (1296·n⁵ + 9720·n⁴ + 30555·n³ + 50665·n² + 44621·n + 16807). A251587

T(n,k)=Number of nXk 0..1 arrays with rows and antidiagonals unimodal. A223680

a(n) = number of steps to reach 0 when starting from k = (n³)-1 and repeatedly applying the map that replaces k with k - A055401(k), where A055401(k) = the number of positive cubes needed to sum to k using the greedy algorithm. A261228

Number of inequivalent binary [ n,3 ] codes of dimension <= 3 without zero columns. A34337

Numbers whose set of base 6 digits is {0,5}. A97252

Numbers k such that k*(k+4) gives the concatenation of two numbers m and m+4. A116317

a(n) = 16·n² + 1. A108211