Properties of the Number 71604

Seventy-One Thousand Six Hundred Four

Basics

Value: 71603 → 71604 → 71605

Parity: even

Prime: No

Previous Prime: 71597

Next Prime: 71633

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ² × 3 ⁴ × 13 × 17

Divisors: 1, 2, 3, 4, 6, 9, 12, 13, 17, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001011110110100

Octal: 213664

Duodecimal: 35530

Hexadecimal: 117b4

Square: 5127132816

Square Root: 267.5892374517331

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

Partial sums of A051797. A51878

First elements of maximal isospectral chains of length 3. A335082

The number of edges on a 2 by 1 ellipse formed by the straight line segments mutually connecting all points formed by dividing the ellipse into 2n equal angle sectors from its origin. A341764

Numbers k such that φ(k) and σ(k) are both perfect squares. A67781

Number of nX2 nonnegative integer arrays with upper left 0 and lower right n+2-5 and value increasing by 0 or 1 with every step right or down. A252970

a(n) = 13 + floor(∑_j=1..n-1 a(j)/3). A120157

Lower Pythagorean twins. A228876

a(n) = T(3n,n), where T is the array defined in A025564. A25571

a(n) is the number of 7-smooth numbers <= n. A71604