Properties of the Number 16172

Sixteen Thousand One Hundred Seventy-Two

Basics

Value: 16171 → 16172 → 16173

Parity: even

Prime: No

Previous Prime: 16141

Next Prime: 16183

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 ² × 13 × 311

Divisors: 1, 2, 4, 13, 26, 52, 311, 622, 1244, 4043

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11111100101100

Octal: 37454

Duodecimal: 9438

Hexadecimal: 3f2c

Square: 261533584

Square Root: 127.16917865583626

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

Pentagonal numbers (A000326) which are the sum of 2 other positive pentagonal numbers. A136117

Convolution of A055589 with A011782. A55852

Pentagonal numbers (A000326) whose digit reversal is a semiprime (A001358). A115709

First differences of A002002. A35028

Successive maxima in sequence A007365. A65933

Number of horizontal segments in all Schroeder paths of length 2n (a horizontal segment is a maximal string of horizontal steps). A104550

Values of n such that (σ(σ(n))-φ(φ(n)))/n is an integer (the corresponding integral ratios are given in A136132). A136131

Number of paths from (0,0) to the line x = n, each segment given by a vector (1,1), (1,-1), or (2,0), not crossing the x-axis, and including no horizontal segment on the x-axis. A247630

Expansion of ∏_n>=1 ((1 - (4·x)ⁿ)/(1 + (4·x)ⁿ))^1/4. A303394

a(n) is the Wiener index of a sling on n+1 vertices. A349417