ℕ atory
Play Now

Properties of the Number -105570

One Hundred Five Thousand Five Hundred Seventy

Basics

Value: -105571 → -105570 → -105569

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 3 × 5 × 17 × 23

Divisors: 1, 2, 3, 5, 6, 9, 10, 15, 17, 18

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

Today's Target

7925 Try Today's Challenge

Representations

Binary: -11001110001100010

Octal: -316142

Duodecimal: -51116

Hexadecimal: -19c62

Square: 11145024900

Square Root: 324.9153735974954

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

Triangular numbers that are the product of two triangular numbers greater than 1. A188630
Numbers n such that sopf(n) = sopf(n+1) - sopf(n-1), where sopf(x) = sum of the distinct prime factors of x. A76525
a(n) = smaller member of n-th pair of distinct, positive, triangular numbers whose sum and difference are also triangular numbers. A185129
Triangular numbers that are sandwiched between two semiprimes; or triangular numbers t such that t-1 and t+1 are both semiprime. A121898
Triangular numbers that can be represented as a product of two triangular numbers greater than 1, and as a product of three triangular numbers greater than 1. A295769
Triangular numbers that are the product of three distinct triangular numbers greater than 1. A225440
Indices of primes in sequence defined by A(0) = 83, A(n) = 10·A(n-1) - 27 for n > 0. A101056
Triangular numbers equal to the sum of a prime number with its index. A115886
Triangular numbers which are 7-almost primes. A76581
A difference triangle of Pascal-Sierpinski 5th level and the Pascal second derivative: a(n,k)= (4·n - 4·k + 1)a(n - 1, k - 1) + (4·k - 3)a(n - 1, k); p(x,n)=(Sum[10·n*(n - 1)*a(n, k)*xk - 1 - D[(x + 1)n + 2, {x, 2}]/(x + 1), {k, n}])/2. A155917