Properties of the Number -142155

One Hundred Forty-Two Thousand One Hundred Fifty-Five

Basics

Value: -142156 → -142155 → -142154

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁷ × 5 × 13

Divisors: 1, 3, 5, 9, 13, 15, 27, 39, 45, 65

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: -100010101101001011

Octal: -425513

Duodecimal: -6A323

Hexadecimal: -22b4b

Square: 20208044025

Square Root: 377.0344811817614

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

Odd numbers divisible by exactly 9 primes (counted with multiplicity). A46322

a(n) = T(n)² - n², where T(n) is a triangular number. A85740

a(n) = 841·n² + 2·n. A158403

n is equal to the number of 1's in all numbers <= n written in base 9. A14884

Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 29. A31707

An eighth of the product of three integers surrounding the (n+1)-st prime, minus half of the product of the 3 numbers surrounding n+1. A141535

G.f. is the polynomial (∏_k=1..26 (1 - x^3·k))/(1-x)²⁶. A162718

Numbers k that divide ∑_j∣k j^k/j. A343982