Properties of the Number -13207

Thirteen Thousand Two Hundred Seven

Basics

Value: -13208 → -13207 → -13206

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 47 × 281

Divisors: 1, 47, 281, 13207

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11001110010111

Octal: -31627

Duodecimal: -7787

Hexadecimal: -3397

Square: 174424849

Square Root: 114.92171248288984

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 T(n, k, q) = (1-qⁿ)*(1/k)*binomial(n-1, k-1)*binomial(n, k-1) - (1-qⁿ) + 1, for q = 2, read by rows. A174731

Number of integer partitions of n without any three parts (a,b,c) (repeats allowed) satisfying a + b = c. A variation of sum-free partitions. A364345

Array read by antidiagonals: T(n,k) is the number of noncrossing partitions up to rotation composed of n blocks of size k. A303694

Number of 11-regular partitions of n (no part is a multiple of 11). A328545

Semiprimes of the form n*(3·n-1)/2. A245365

Number of compositions of n such that every restriction to a circular subinterval has a different sum. A325679

Sum of all squarefree semiprimes with greater prime factor prime(n). A339194

a(1) = 2; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1. A25003

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

Number of unlabeled 4-gonal cacti having n polygons. A54362