Properties of the Number 71442

Seventy-One Thousand Four Hundred Forty-Two

Basics

Value: 71441 → 71442 → 71443

Parity: even

Prime: No

Previous Prime: 71437

Next Prime: 71443

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ⁶ × 7 ²

Divisors: 1, 2, 3, 6, 7, 9, 14, 18, 21, 27

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10001011100010010

Octal: 213422

Duodecimal: 35416

Hexadecimal: 11712

Square: 5103959364

Square Root: 267.28636328851496

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

Stirling2 triangle with scaled diagonals (powers of 3). A75498

Numbers whose product of exponents is equal to the sum of prime factors. A71175

Sixth column of triangle A075498. A75516

Even refactorable numbers k such that the number r of odd divisors of k and the number s of even divisors of k are both odd divisors of k. A120361

Number of bases to which terms of A141768 are strong pseudoprimes. A195328

Depth of Pascal's triangle such that the number of elements in the triangle is a factor of the sum of the elements. A272934

Least number k such that k has n anti-divisors. A66464

Numbers n such that the squarefree kernel of n is equal to the number of divisors of n. A70226

Even refactorable numbers k such that the number r of odd divisors and the number s of even divisors are both odd divisors of k and k is the first number for which the triple (r,s,t) occurs, where t is the number of divisors of k. A120358

a(n) = 9*(n-2)² * (n² - 2·n - 1). A60788