Properties of the Number 40071

Forty Thousand Seventy-One

Basics

Value: 40070 → 40071 → 40072

Parity: odd

Prime: No

Previous Prime: 40063

Next Prime: 40087

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 19 ² × 37

Divisors: 1, 3, 19, 37, 57, 111, 361, 703, 1083, 2109

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001110010000111

Octal: 116207

Duodecimal: 1B233

Hexadecimal: 9c87

Square: 1605685041

Square Root: 200.17742130420203

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) = sigma₆(n²)/sigma₃(n²). A84220

Smallest positive integer m such that m = π(n·m) = A000720(n·m). A38626

Numbers k such that prime(k+1) == 1 (mod k). A105286

Numbers n such that there are precisely 15 groups of orders n and n + 1. A295995

Values of transition of A072608(n) from alternating behavior (0,1,0,1,..) into steadily-1 (1,1,1,..) behavior or changing back. Expressing in terms of A072609(n): at n values it switches from steadily 0 into steadily 1 successive values or back. A72610

Numerators of the inverse binomial transform of a shuffled sequence of "original" Bernoulli and Bernoulli numbers. A176150

Sequence related to the Hankel transform of A105523(n+5). A181474

Number of orbits of Aut(Z⁷) as function of the infinity norm n of the representative lattice point of the orbit, when the cardinality of the orbit is equal to 26880. A266397

Numbers k such that k = PrimePi(k·digsum(k)). A353126

Continued fraction for sqrt(80). A40071