141 (number)

141 (one hundred forty-one) is a whole number. It comes after 140 and before 142.

• Factors: 141 is a composite number. It can be written as 3×47.
• Semiprime: Because 141 has exactly two prime factors (3 and 47), it is called a semiprime.
• Palindromic: In base 10, 141 looks the same forward and backward (141), so it is a palindromic number.
• Centered pentagonal: 141 is the 8th centered pentagonal number in mathematics.

• Odd number: 141 is an odd number because it cannot be divided by 2.
• Not a Harshad number: The sum of the digits of 141 is 1+4+1=6. Since 141÷6=23.5 (not an integer), it is not a Harshad number.
• Binary and other bases:
  • In binary, 141 is written as 10001101.
  • In octal (base 8), 141 is written as 215.
  • In hexadecimal (base 16), 141 is 8D.
• Area code: In the United Kingdom, 141 is the telephone area code for Glasgow, Scotland.