Properties of the Number 495

Four Hundred Ninety-Five

Basics

Value: 494 → 495 → 496

Parity: odd

Prime: No

Previous Prime: 491

Next Prime: 499

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 5 × 11

Divisors: 1, 3, 5, 9, 11, 15, 33, 45, 55, 99

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101111

Octal: 757

Duodecimal: 353

Hexadecimal: 1ef

Square: 245025

Square Root: 22.24859546128699

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

Binomial coefficient binomial(n,4) = n*(n-1)*(n-2)*(n-3)/24. A332

Generalized pentagonal numbers: m*(3·m - 1)/2, m = 0, +-1, +-2, +-3, .... A1318

a(n) = n*(n+3)/2. A96

Binary palindromes: numbers whose binary expansion is palindromic. A6995

Number of 2n-bead balanced binary necklaces of fundamental period 2n, equivalent to reversed complement; also Dirichlet convolution of b_n=2^n-1 with μ(n); also number of components of Mandelbrot set corresponding to Julia sets with an attractive n-cycle. A740

a(n) = binomial(3n,n). A5809

Second pentagonal numbers: a(n) = n*(3·n + 1)/2. A5449

Irregular triangle read by rows: T(n,k) = binomial(n-k, k), n >= 0, 0 <= k <= floor(n/2); or, coefficients of (one version of) Fibonacci polynomials. A11973

Multiples of 11. A8593

Triangle T(n,k) with diagonals T(n,n-k) = binomial(n, 2·k). A98158