Properties of the Number 254

Two Hundred Fifty-Four

Basics

Value: 253 → 254 → 255

Parity: even

Prime: No

Previous Prime: 251

Next Prime: 257

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2 × 127

Divisors: 1, 2, 127, 254

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11111110

Octal: 376

Duodecimal: 192

Hexadecimal: fe

Square: 64516

Square Root: 15.937377450509228

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

Central polygonal numbers (the Lazy Caterer's sequence): n(n+1)/2 + 1; or, maximal number of pieces formed when slicing a pancake with n cuts. A124

The primes doubled; even semiprimes. A100484

a(n) = 2ⁿ - 2. A918

Triangle of numbers T(n,k) = k!*Stirling2(n,k) read by rows (n >= 1, 1 <= k <= n). A19538

Finitary numbers. Matula-Goebel numbers of rooted identity trees. A276625

Number of separable partitions of n; see Comments. A325534

a(2·n) = 3·2ⁿ - 2; a(2·n+1) = 2ⁿ⁺² - 2. A27383

Positive integers having distinct base-2 run lengths. A44813

Number of compositions of n if all summand runs are kept together. A274174

Average of two consecutive odd primes. A24675