Properties of the Number 26861

Twenty-Six Thousand Eight Hundred Sixty-One

Basics

Value: 26860 → 26861 → 26862

Parity: odd

Prime: Yes

Previous Prime: 26849

Next Prime: 26863

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 26861

Divisors: 1, 26861

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 110100011101101

Octal: 64355

Duodecimal: 13665

Hexadecimal: 68ed

Square: 721513321

Square Root: 163.8932579455299

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

Where the prime race 4k-1 vs. 4k+1 changes leader. A7350

Odd primes p such that the number of primes less than p that are congruent to 1 (mod 4) is equal to the number of primes less than p that are congruent to 3 (mod 4). A96447

Primes p for which pi_4,3(p) < pi_4,1(p), where pi_m,a(x) is the number of primes <= x which are congruent to a (mod m). A199547

Primes p for which pi_4,3(p) - pi_4,1(p) = -1, where pi_m,a(x) is the number of primes <= x which are congruent to a (mod m). A51025

Start of a string of exactly 3 consecutive (but disjoint) pairs of twin primes. A35791

First primes of an arithmetic progression of six primes with common difference 30. A156204

First primes of arithmetic progressions of 5 primes each with the common difference 30. A227281

T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out left turns. A221780

Sum of composite numbers between prime p and nextprime(p) is palindromic. A54266

Numerators of partial sums of (p+q)/p·q, where p and q are primes. A120833