Properties of the Number 84155

Eighty-Four Thousand One Hundred Fifty-Five

Basics

Value: 84154 → 84155 → 84156

Parity: odd

Prime: No

Previous Prime: 84143

Next Prime: 84163

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 16831

Divisors: 1, 5, 16831, 84155

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 10100100010111011

Octal: 244273

Duodecimal: 4084B

Hexadecimal: 148bb

Square: 7082064025

Square Root: 290.0948120873588

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

Numbers m such that 2^m reversed is prime. A57708

Number of edges formed inside a right triangle by the straight line segments mutually connecting all vertices and points on the two shorter edges whose positions on one edge equal the Farey series of order n while on the other they divide its length into n equal segments. A359976

G.f.: ∑_n>=0 (n+1) * xⁿ * (1 + xⁿ)ⁿ. A326002

Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation. A146826

A Pell-related fourth-order recurrence. A84155

Number of ways to write n as x² + y² + z² + w² with x,z positive integers and y,w nonnegative integers such that both 9·x² + 246·x*y + y² and 9·z² + 666·z*w + w² are squares. A281729