Properties of the Number 140

One Hundred Forty

Basics

Value: 139 → 140 → 141

Parity: even

Prime: No

Previous Prime: 139

Next Prime: 149

Digit Sum: 5

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5 × 7

Divisors: 1, 2, 4, 5, 7, 10, 14, 20, 28, 35

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10001100

Octal: 214

Duodecimal: B8

Hexadecimal: 8c

Square: 19600

Square Root: 11.832159566199232

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

Numbers that are not squarefree. Numbers that are divisible by a square greater than 1. The complement of A005117. A13929

Triangle of Stirling numbers of the second kind, S2(n,k), n >= 1, 1 <= k <= n. A8277

Square pyramidal numbers: a(n) = 0² + 1² + 2² + ... + n² = n*(n+1)*(2·n+1)/6. A330

Abundant numbers (sum of divisors of m exceeds 2m). A5101

a(n) = denominator of harmonic number H(n) = ∑_i=1..n 1/i. A2805

Number of dissections of a polygon: binomial(4·n, n)/(3·n + 1). A2293

Triangle of coefficients of polynomials u(n,x) jointly generated with A029653; see the Formula section. A208510

Numbers in base 5. A7091

Niven (or Harshad, or harshad) numbers: numbers that are divisible by the sum of their digits. A5349

Number of step shifted (decimated) sequence structures using a maximum of two different symbols. A56391

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