Properties of the Number 16745

Sixteen Thousand Seven Hundred Forty-Five

Basics

Value: 16744 → 16745 → 16746

Parity: odd

Prime: No

Previous Prime: 16741

Next Prime: 16747

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 17 × 197

Divisors: 1, 5, 17, 85, 197, 985, 3349, 16745

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100000101101001

Octal: 40551

Duodecimal: 9835

Hexadecimal: 4169

Square: 280395025

Square Root: 129.40247292845683

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

For 1 < x, each c(i) is "multiply" (*) or "divide" (/); a(n) is number of choices for c(0),...,c(n-1) so that 1 c(0) x¹ c(1) x²,.., c(n-1) xⁿ is an integer. A59529

a(n) = ∑_{k=0..floor(n/2)} T(n,k), T given by A026780. A26788

Numbers that are the sum of one or more consecutive squares in more than one way. A130052

a(n) = n⁴/2 - n³ + 3·n²/2 - n + 1 = (n² + 1)*(n² - 2·n + 2)/2. A58919

Numbers that are sums of 2 or more consecutive squares in more than 1 way. A62681

Positive numbers y such that y² is of the form x²+(x+17)² with integer x. A155923

Number of different fixed (possibly) disconnected tetrominoes bounded (not necessarily tightly) by an n X n square. A162674

Lexicographically earliest sequence of nonnegative integers such that two distinct terms differ by at least 4 decimal digits. A346000

a(n) = 6·a(n-1)-a(n-2) for n > 2; a(1) = 17, a(2) = 85. A156157

Numbers of the form p·q*r where p, q, r are distinct primes congruent to 1 mod 4 such that Legendre(p/q) = Legendre(p/r) = Legendre(q/r) = -1. A323271