Properties of the Number 70561

Seventy Thousand Five Hundred Sixty-One

Basics

Value: 70560 → 70561 → 70562

Parity: odd

Prime: No

Previous Prime: 70549

Next Prime: 70571

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 41 × 1721

Divisors: 1, 41, 1721, 70561

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10001001110100001

Octal: 211641

Duodecimal: 34A01

Hexadecimal: 113a1

Square: 4978854721

Square Root: 265.6332057556058

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

G.f.: exp( ∑_n>=1 A001333(n)² * xⁿ/n ) where A001333(n) = A002203(n)/2, one-half the companion Pell numbers. A204061

Number of compositions (ordered partitions) of n into distinct squarefree parts. A331846

Number of pairs with two different elements which can be obtained by selecting unique elements from two sets with n+1 and n² elements respectively and n common elements. A85490

Number of non-congruent solutions of x² + y² + z² + t² == 0 mod n. A240547

Numbers n such that (n(n+1)/2) modulo σ(n) = n. A232538

Distance from 10ⁿ to the next prime triplet. A357052

Strong pseudoprimes to base 26. A20252

Strong pseudoprimes to base 48. A20274

Triangle, read by rows, T(n, k) = T(n, k-1) + (k+1)*n!, T(n, 0) = 1. A105064

a(n) = 1 + 2·n*n!. A155159