Properties of the Number 26381

Twenty-Six Thousand Three Hundred Eighty-One

Basics

Value: 26380 → 26381 → 26382

Parity: odd

Prime: No

Previous Prime: 26371

Next Prime: 26387

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 23 × 31 × 37

Divisors: 1, 23, 31, 37, 713, 851, 1147, 26381

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 110011100001101

Octal: 63415

Duodecimal: 13325

Hexadecimal: 670d

Square: 695957161

Square Root: 162.4222891108237

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 (2^k - k + 1)*2^k - 1 is prime. A201361

Number of ternary rooted trees with n nodes and height at most 7. A36375

Dying rabbits: a(n) = a(n-1) + a(n-2) - a(n-10). A23440

Nonsemiprimes in A306097 = A121707 \ A267999. A321488

Indices of primes in the sequence defined by A(0) = 29, A(n) = 10·A(n-1) - 71 for n > 0. A101955

Number of 2 X n 0..3 arrays with no element equal to zero plus the sum of elements to its left or zero plus the sum of the elements above it or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4. A239859

T(n,n-2), where T is the array in A026374. A26381

Number of nX5 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 0,1,0,0,0 for x=0,1,2,3,4. A197472