Properties of the Number 10981

Ten Thousand Nine Hundred Eighty-One

Basics

Value: 10980 → 10981 → 10982

Parity: odd

Prime: No

Previous Prime: 10979

Next Prime: 10987

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 79 × 139

Divisors: 1, 79, 139, 10981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101011100101

Octal: 25345

Duodecimal: 6431

Hexadecimal: 2ae5

Square: 120582361

Square Root: 104.7902667235846

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

Number of superdiagonal partitions: partitions (p1, p2, p3, ...) of n such that π >= i. A238873

Number of series-reduced trees with n nodes. A14

Composite numbers whose divisors (except 1) all contain the digit 9. A62680

Semiprimes in A003215. A113530

Period of the Fibonacci 3-step sequence A000073 mod prime(n). A106302

Number of partitions of n into parts not of the form 13k, 13k+6 or 13k-6. Also number of partitions with at most 5 parts of size 1 and differences between parts at distance 5 are greater than 1. A35954

Semiprimes p such that next semiprime after p is p + 10. A217030

Constant term of the reduction by x²->x+1 of the polynomial p(n,x)=1+xⁿ+x²ⁿ⁺². A192472

Maximal term of TRIP-Stern sequence of level n corresponding to permutation triple (e,23,e). A271488

An "extremely strange sequence": a(n+1) = [ A·a(n)+B ]/p^r, where p^r is the highest power of p dividing [ A·a(n)+B ] and p=2, A=4.001, B=1.2. A28948