Properties of the Number -161406

One Hundred Sixty-One Thousand Four Hundred Six

Basics

Value: -161407 → -161406 → -161405

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 7 ² × 61

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

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100111011001111110

Octal: -473176

Duodecimal: -794A6

Hexadecimal: -2767e

Square: 26051896836

Square Root: 401.7536558638888

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 labeled digraphs where every node has indegree 0 or outdegree 0 and no isolated nodes. A52332

Triangle T(n,k) of strongly graded (3+1)-free partially ordered sets (posets) on n labeled vertices with height k. A222864

Triangle read by rows: T(n,k) is the number of labeled tiered posets with n elements and height k. A361956

Number of labeled bipartite graphs on n vertices with no isolated vertices. A122802

Triangle T(n,k) read by rows: T(n, k) = (m·n - m·k + 1)*T(n - 1, k - 1) + (5·k - 4)*(m·k - (m - 1))*T(n - 1, k) where m = 0. A166973

Numbers that divide the sum of the reverse of their divisors (A069192). A254008