Properties of the Number 15961

Fifteen Thousand Nine Hundred Sixty-One

Basics

Value: 15960 → 15961 → 15962

Parity: odd

Prime: No

Previous Prime: 15959

Next Prime: 15971

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 11 × 1451

Divisors: 1, 11, 1451, 15961

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 11111001011001

Octal: 37131

Duodecimal: 92A1

Hexadecimal: 3e59

Square: 254753521

Square Root: 126.3368513142543

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

a(n) = (n+1)⁵ - n⁵. A22521

a(n) = n*(3·n² - 1)/2. A4188

a(n) = 8ⁿ - 7ⁿ. A16177

Number of "ON" cubic cells at n-th stage in simple 3-dimensional cellular automaton: a(n) = A160428(n)/8. A161342

Difference of two positive 5th powers. A181124

a(n) = ∑_{1 <= i, j <= n} gcd(i, j, n)³. A368743

a(n) = 8ⁿ mod 7ⁿ. A138973

a(n) = ∑_k=0..[n/2] C(n-k,k)⁴*n/(n-k), n>=1. A166899

Nonprime numbers with all divisors starting and ending with digit 1. A208261

Numbers n such that 4n + 1, 4n + 2 and 4n + 3 are not squarefree. A258332