Properties of the Number 15860

Fifteen Thousand Eight Hundred Sixty

Basics

Value: 15859 → 15860 → 15861

Parity: even

Prime: No

Previous Prime: 15859

Next Prime: 15877

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ² × 5 × 13 × 61

Divisors: 1, 2, 4, 5, 10, 13, 20, 26, 52, 61

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11110111110100

Octal: 36764

Duodecimal: 9218

Hexadecimal: 3df4

Square: 251539600

Square Root: 125.93649193144932

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

Triangle of q-binomial coefficients for q=-3. A15110

The number of permutations p of {1,...,n} such that |p(i)-p(i+1)| is in {1,2,3,4} for all i from 1 to n-1. A174701

Gaussian binomial coefficient [ n,3 ] for q = -3. A15268

Susceptibility series H₃ for 2-dimensional Ising model (divided by 2). A54410

Non-palindromic numbers n such that φ(n) = φ(reversal(n)). A97647

Practical numbers z such that z² = x² + y² for some practical numbers·and y with gcd(x,y,z) = 4. A294112

Square array A(n,k) = A388991(A388981(n, k)), read by descending antidiagonals. A388989

Numbers m such that the numerator of ∑_{k=1..m, gcd(k,m) = 1} 1/k is divisible by m³. A290815

Triangle read by rows: T(n,k) is the number of self-avoiding paths of length n-1+2·k from NW to SW corners in the n X n grid graph (0 <= k <= A000217(n-1), n >= 1). A329633

Total number of weak left-to-right maxima in Dyck paths of semilength n. A346158