Properties of the Number 72128

Seventy-Two Thousand One Hundred Twenty-Eight

Basics

Value: 72127 → 72128 → 72129

Parity: even

Prime: No

Previous Prime: 72109

Next Prime: 72139

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ⁶ × 7 ² × 23

Divisors: 1, 2, 4, 7, 8, 14, 16, 23, 28, 32

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001100111000000

Octal: 214700

Duodecimal: 358A8

Hexadecimal: 119c0

Square: 5202448384

Square Root: 268.5665653055123

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

Triangle of numbers arising in enumeration of walks on cubic lattice. A52179

Triangle read by rows: T(n, k) is the Sheffer triangle ((1 - 3·x)^-1/3, (-1/3)*log(1 - 3·x)). A generalized Stirling1 triangle. A286718

a(n) = 3rd elementary symmetric function of first n+2 positive integers congruent to 1 mod 3. A24213

Molecular topological indices of the folded cube graphs. A192826

Number of -3..3 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(-1)^t+u+v) having two, four or five distinct values for every i,j,k<=n. A211723

Zuckerman numbers which when divided by the product of their digits, give a quotient which is a Niven (Harshad) number. A343682

a(n) = n-th elementary symmetric function of the first n+1 positive integers congruent to 1 mod 3. A24216

Number of permutations of 1..n containing the relative rank sequence { 1234567 } at any spacing. A159175

Number of pairs of complex Golay sequences of length n. A72128