7,500

[EECS]  7.5K(W) is one of standard numerical values for resistors (of tolerance class 5%).

 

7,503

[Math.]  A triangular number (sum of all integers from 1 to 122):  7503 = 1+2+…+121+122.

 

7,506

[Library]  ISBN-0-7506 is the International Standard Book Number for books published by Newnes/Elsevier Science.

 

7,523

[Math.]  A prime number whose 4 digits are the first 4 single-digit prime numbers: 2, 3, 5 and 7.

 

7,525

[Math.]  75252 = 56,625,625.

 

7,547

[Literature]  The longest poem in the world, written by Patrick Huet (France) in 2006, “Pieces of Hope to the Echo of the World” has 7547 verses. It is an “acrostic” whose first letters of each verse spell out the text of 30 articles of the 1948 Universal Declaration of Human Rights. It is displayed on a roll of fabric of 3261 feet or about 994 meters.

 

7,560

[Math.]  Sum (in degrees) of all internal angles of a 44-side polygon.

 

7,561

[Math.]  A prime number.  The first Markov numbers are 1, 2, 5, 13, 29, 34, 89, 169, 194, 233, 433, 610, 985, 1325, 1597, 2897, 4181, 5741, 6466, 7561, 9077…

 

7,586

[Math.]  7586 = 777+55+88+6666.

 

7,596 

[Math.]  Two multiples of number 3798, 3798×2 = 7596 and 3798×9 = 34,182, use each of 9 digits 1-9 once.