Properties of the Number 17442

Seventeen Thousand Four Hundred Forty-Two

Basics

Value: 17441 → 17442 → 17443

Parity: even

Prime: No

Previous Prime: 17431

Next Prime: 17443

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 17 × 19

Divisors: 1, 2, 3, 6, 9, 17, 18, 19, 27, 34

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100010000100010

Octal: 42042

Duodecimal: A116

Hexadecimal: 4422

Square: 304223364

Square Root: 132.06816421833082

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

a(n) = n²*(n² - 1)/6. A8911

Number of ways to place 2 points on a triangular grid of side n so that they are not adjacent. A239568

a(1)=1, a(n) = a(n-1) + sum of odd numbers which are among the first (n-1) terms of the sequence. A131093

Number of recursively anti-transitive ordered rooted trees with n nodes. A358455

Pentagonal numbers that are abundant. A379264

The following triangle is based on Pascal's triangle. The r-th term of the n-th row is sum of C(n,r) successive integers so that the sum of all the terms of the row is (2ⁿ)*(2ⁿ+1)/2, the 2ⁿ -th triangular number. Sequence contains the triangle read by rows. A112358

Determinant of n X n matrix whose diagonal contains the first n tetrahedral numbers and all other elements are 1's. A118714

a(n) = 3·n*(9·n - 1)/2. A268351

Triples of practical numbers: numbers n such that n-2, n, n+2 are all practical numbers. A287682

Write 1, 2, 3, 4, ... counterclockwise in a hexagonal spiral around 0 starting left down, then a(n) is the sequence found by reading from 0 in the vertical upward direction. A63436