Properties of the Number 1705

One Thousand Seven Hundred Five

Basics

Value: 1704 → 1705 → 1706

Parity: odd

Prime: No

Previous Prime: 1699

Next Prime: 1709

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 5 × 11 × 31

Divisors: 1, 5, 11, 31, 55, 155, 341, 1705

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11010101001

Octal: 3251

Duodecimal: BA1

Hexadecimal: 6a9

Square: 2907025

Square Root: 41.291645644125154

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

Tribonacci numbers: a(n) = a(n-1) + a(n-2) + a(n-3) for n >= 3 with a(0) = a(1) = 0 and a(2) = 1. A73

Number of "ON" cells at n-th stage in the "Ulam-Warburton" two-dimensional cellular automaton. A147562

4-dimensional pyramidal numbers: a(n) = (3·n+1)*binomial(n+2, 3)/4. Also Stirling2(n+2, n). A1296

Dispersion of A042948 (numbers >3, congruent to 0 or 1 mod 4), by antidiagonals. A191663

Convolution of A000203 with itself. A385

Second spoke of a hexagonal spiral. A56106

Generalized 28-gonal (or icosioctagonal) numbers: m*(13·m - 12) with m = 0, +1, -1, +2, -2, +3, -3, ... A303812

Numbers m such that there are precisely 7 groups of order m. A249550

Numbers of the form n*(7n+-1)/2. A57570

Triangle read by rows: T(n,k) is the number of c-nets with n+1 faces and k+1 vertices. A290326