Properties of the Number 7845

Seven Thousand Eight Hundred Forty-Five

Basics

Value: 7844 → 7845 → 7846

Parity: odd

Prime: No

Previous Prime: 7841

Next Prime: 7853

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 5 × 523

Divisors: 1, 3, 5, 15, 523, 1569, 2615, 7845

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1111010100101

Octal: 17245

Duodecimal: 4659

Hexadecimal: 1ea5

Square: 61544025

Square Root: 88.57200460642177

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

Sum of 10 nonzero 8th powers. A3388

Triangle T(n,k) of k-block tricoverings of an n-set (n >= 3, k >= 4). A60487

T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with no element having a strict majority of its horizontal, vertical, diagonal and antidiagonal neighbors equal to one. A231806

Triangle read by rows: T(n,k) is the number of chiral pairs of color loops of length n with exactly k different colors. A305541

a(n) = n·A001865(n). A63169

T(n,k)=Number of nXk 0..4 arrays with each element·equal to the number of its horizontal and vertical neighbors equal to 2,3,1,1,0 for x=0,1,2,3,4. A197503

Numbers that are the sum of ten fourth powers in eight or more ways. A345601

Numbers that are the sum of ten fourth powers in exactly eight ways. A345860

Number of 5-block tricoverings of an n-set. A60483

T(n,k) is the number of non-equivalent distinguishing colorings of the cycle on n vertices with exactly k colors (k>=1). Regular triangle read by rows, n >= 1, 1 <= k <= n. A309651