Properties of the Number 494

Four Hundred Ninety-Four

Basics

Value: 493 → 494 → 495

Parity: even

Prime: No

Previous Prime: 491

Next Prime: 499

Digit Sum: 17

Digital Root: 8

Palindrome: Yes

Factorization: 2 × 13 × 19

Divisors: 1, 2, 13, 19, 26, 38, 247, 494

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101110

Octal: 756

Duodecimal: 352

Hexadecimal: 1ee

Square: 244036

Square Root: 22.22611077089287

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

Palindromes in base 10. A2113

a(n) = binomial(n+1, 2) + n - 1 = n*(n+3)/2 - 1. A34856

Infinite sequence starting with a(0)=0 such that A049820(a(k)) = a(k-1) for all k>=1, where A049820(n) = n - (number of divisors of n). A259934

Numbers m such that ∑_k=1..m (<1/2 + k·r> - <k·r>) = 0, where r=sqrt(2) and < > denotes fractional part. A194368

a(n) = ∑_d∣n (-1)^d-1*d². A321543

Second-order Eulerian triangle T(n,k), 1 <= k <= n. A8517

Numbers whose ternary expansion contains no 1's. A5823

Pentagonal numbers multiplied by 2: a(n) = n*(3·n-1). A49450

Numbers k such that 3^k + 2 is prime. A51783

Number of partitions of n that sorted in increasing order do not contain a part k in position k. A238394