Properties of the Number 1606

One Thousand Six Hundred Six

Basics

Value: 1605 → 1606 → 1607

Parity: even

Prime: No

Previous Prime: 1601

Next Prime: 1607

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2 × 11 × 73

Divisors: 1, 2, 11, 22, 73, 146, 803, 1606

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 11001000110

Octal: 3106

Duodecimal: B1A

Hexadecimal: 646

Square: 2579236

Square Root: 40.07492981902776

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

Numbers k for which 10k+1, 10k+3, 10k+7 and 10k+9 are primes. A7811

Numbers that are the sum of 6 positive 5th powers. A3351

Expansion of (1+x)/(1-x-4·x²). A26597

Number of strongly connected digraphs with n labeled nodes. A3030

Number of partitions of n containing no part i of multiplicity i. A276429

Generalized Catalan numbers C(3; n). A64063

Triangle composed of generalized Catalan numbers. A64094

Triangle G(n, k) read by rows for 0 <= k <= n, where G(n, 0) = G(n+1, n+1) = 1, G(n+2, n+1) = 2, G(n+3, n+1) = 4, G(n+4, n+1) = 8, and G(n+5, m) = G(n+1, m-1) + G(n+1, m) + G(n+2, m) + G(n+3, m) + G(n+4, m) for n >= 0 for m = 1..(n+1). A140996

Triangle G(n, k) read by rows, for 0 <= k <= n, where G(n, n) = G(n+1, 0) = 1, G(n+2, 1) = 2, G(n+3, 2) = 4, G(n+4, 3) = 8, and G(n+5, m) = G(n+1, m-3) + G(n+1, m-4) + G(n+2, m-3) + G(n+3, m-2) + G(n+4, m-1) for n >= 0 and m = 4..(n+4). A140995

a(n) is the solution to the postage stamp problem with n denominations and 4 stamps. A1214