4,104

[Math.]  The smallest such number is 1729 = 123+13 = 103+93.

The 2nd smallest number that is the sum of the 2 cube numbers in 2 ways: 153+93 = 163+23.

 

4,123

[Sport]  One of soccer’s possible lineup tactics formations: 5-2-3 (5 defenders, 2 midfielders and 3 forwards). A slightly modified defenders line makes: 1-4-2-3 (1 sweeper), or 4-1-2-3 (1 stopper).

 

4,127

[Library]  ISBN-0-4127 is the International Standard Book Number for books published by LW Press, a division of Publishers International, Ltd.

[Math.]  A prime number.

 

4,132

[Sport] One of soccer’s possible lineup tactics formations: 5-3-2 (5 defenders, 3 midfielders and 2 forwards). A slightly modified defenders line makes: 1-4-3-2 (1 sweeper), or 4-1-3-2 (1 stopper).

 

4,140

[Math.]  Sum (in degrees) of all internal angles of a 25-side polygon.

 

4,141

[Sport]  One of soccer’s possible lineup tactics formations: 5-4-1 (5 defenders, 4 midfielders and 1 forward). A slightly modified defenders line makes: 1-4-4-1 (1 sweeper), or 4-1-4-1 (1 stopper).

 

4,145

[Geology]  The longest river in the world: Nile, in Egypt, 4145-mile or 6671-meter long.

 

4,150-4,151

[Math.] 

4150 = 45+15+55+05.

4151 = 45+15+55+15.

4152 = 45+15+55+2.

4153 = 45+15+55+3. A prime number.

4154 = 45+15+55+4.

4155 = 45+15+55+5.

4156 = 45+15+55+6.

4157 = 45+15+55+7. A prime number.

4158 = 45+15+55+8.

4159 = 45+15+55+9. A prime number.

 

4,160 & 4,161

[Math.]  4160 = 43+163+03

              4161 = 43+163+13. 

 

4,181

[Math.]  The 19th Fibonacci number. The first Fibonacci number with prime subscript that is a composite number itself.

 

[Math.]  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…

 

4,186

[Math.]  A triangular number (sum of all integers from 1 to 91): 4186 = 1+2+…+90+91.