Properties of the Number 71940

Seventy-One Thousand Nine Hundred Forty

Basics

Value: 71939 → 71940 → 71941

Parity: even

Prime: No

Previous Prime: 71933

Next Prime: 71941

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 ² × 3 × 5 × 11 × 109

Divisors: 1, 2, 3, 4, 5, 6, 10, 11, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

5184 Try Today's Challenge

Representations

Binary: 10001100100000100

Octal: 214404

Duodecimal: 35770

Hexadecimal: 11904

Square: 5175363600

Square Root: 268.2163305990148

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

Number of n-bead ternary necklaces (no turning over allowed) that avoid the subsequence 110. A274018

a(n) = 4·n*(floor(n²/2)+1). For n >= 3, this is the number of directed Hamiltonian paths on the n-prism graph. A124350

Consecutive states of the linear congruential pseudo-random number generator (1093·s + 18257) mod 86436 when started at s=1. A385340

Even heptagonal pyramidal numbers. A218325

a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n+1-k), where k = [ (n+1)/2 ], s = (F(2), F(3), ...), t = A000201 (lower Wythoff sequence). A24593

a(n) = s(1)t(n) + s(2)t(n-1) + ... + s(k)t(n-k+1), where k = [ n/2 ], s = (F(2), F(3), F(4), ...), t = A000201 (lower Wythoff sequence). A25107

a(n) = T(n,[ n/2 ]), where T is the array in A026323. A26336

Index of first occurrence of n in A109883, or -1 if n does not occur in A109883. A109886

Number of 1's among the first n terms of the simple continued fraction for π. A71940