Properties of the Number 70981

Seventy Thousand Nine Hundred Eighty-One

Basics

Value: 70980 → 70981 → 70982

Parity: odd

Prime: Yes

Previous Prime: 70979

Next Prime: 70991

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 70981

Divisors: 1, 70981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001010101000101

Octal: 212505

Duodecimal: 350B1

Hexadecimal: 11545

Square: 5038302361

Square Root: 266.42259663924904

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

Primes whose base-4 representation also is the base 2-representation of a prime. A235461

Number of set partitions of a 2n-set into even blocks which have even length minus the number of partitions into even blocks which have odd length. A260884

a(0)=1, a(1)=1, a(2)=1, a(n) = 2·a(n-1) + a(n-2) + 1. A33539

Primes in A005891 = Centered pentagonal numbers: (5n² + 5n + 2)/2. A145838

Square array read by ascending antidiagonals: number of m-shape complementary Bell numbers. A260875

Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 534", based on the 5-celled von Neumann neighborhood. A282960

Expansion of (1 + 3·x - 2·x²)/(1 - 7·x + 7·x² - x³). A301383

E.g.f. satisfies A(x) = exp( x/(1-x)² * A(x)² ). A362776

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where T(n,k) = n! * ∑_j=0..n binomial(n+(k-1)*(j+1),n-j)/j!. A361616

Centered 13-gonal (or tridecagonal) primes. A262493