Properties of the Number 3961

Three Thousand Nine Hundred Sixty-One

Basics

Value: 3960 → 3961 → 3962

Parity: odd

Prime: No

Previous Prime: 3947

Next Prime: 3967

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 17 × 233

Divisors: 1, 17, 233, 3961

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 111101111001

Octal: 7571

Duodecimal: 2361

Hexadecimal: f79

Square: 15689521

Square Root: 62.93647591023825

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

Centered square numbers: a(n) = 2·n*(n+1)+1. Sums of two consecutive squares. Also, consider all Pythagorean triples (X, Y, Z=Y+1) ordered by increasing Z; then sequence gives Z values. A1844

9-gonal (or enneagonal or nonagonal) numbers: a(n) = n*(7·n-5)/2. A1106

Fifth spoke of a hexagonal spiral. A56109

Number of partitions of n that do not contain 2 as a part. A27336

a(n) is the least k such that the remainder when 10^k is divided by k is n. A127818

Generalized 28-gonal (or icosioctagonal) numbers: m*(13·m - 12) with m = 0, +1, -1, +2, -2, +3, -3, ... A303812

Number of integer partitions of n that can be partitioned into a set of sets. A382077

Least hypotenuse of primitive Pythagorean triangles with odd leg 2n+1. A96891

a(n) = 8·n² + 4·n + 1. A102083

Irregular triangle read by rows where T(n,k) is the number of simple graphs covering n vertices with exactly k triangles, 0 <= k <= binomial(n,3). A372167