Numbers 120,000,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

110,000,000120,000,000130,000,000 – 140,000,000

150,000,000160,000,000170,000,000180,000,000190,000,000

[1M] & [10M] & [100M- [200M] - [300M] - [400M] - [500M] - [600M] - [700M] - [800M] - [900M]  & [1B]

1  - 10 - 100  - 1000 - 10,000 - 100,000 - 1M - 10M - 100M1B10B - 100B - 1T - 10T - 100T - 1Q ...

120,000,000

[Biology]  The number of rods in a human eye to help seeing black and white. Each eye has approximately 6,000,000 cones to help seeing color.

121,550,625

[Math.]  (1+2+…+14)4 = [(15+25+…+145)+(17+27+…+147)]/2.

121,572,676

[Math.]  Sum of the first 148 cube numbers:

13+23+…+1483 = 121,572,676 = (1+2+…+148)2 = 11,0262.

122,333,221

[Math.]  A palindromic prime number.

123,000,000s (separate page)

124,002,480

[Math.] Two consecutive sums of consecutive square numbers:  124,002,480 = 19532+…+19842 = 19852+…+20152.

124,367,958

[Math.]  Zero-less pan-digital number factorization:

124,367,958 = 627×198354 = 9×26×531487.

124,880,625

[Math.]  Sum of the first 149 cube numbers:

13+23+…+1493 = 124,880,625 = (1+2+…+149)2 = 11,1752.

128,255,625

[Math.] Sum of the first 150 cube numbers:

13+23+…+1503 = 128,255,625 = (1+2+…+150)2 = 11,3252.

128,787,625

[Math.]  A cube number which is sum of 3 cube numbers:

5053 = 593+1633+4993 = 128,787,625.

129,572,008

[Math.] The 40th Keith number.

129,644,790

[Math.]  A Catalan number: C17 = 129,644,790.

xyz,abc,def

[Math.]  For any xyz = 100 to 999, there are always six 6-digit numbers abc,edf such that the sum (xyz+abc,def) is equal to one of 6 digit-rotations of 142,857 and the number  xyz,abc,def is a multiple of 142,857.

For any xyz = 100 to 999, there are always twelve 6-digit numbers abc,edf such that the sum (xyz+abc,def) is equal to one of 12 digit-rotations of 076,923 or 153,846 and the number xyz,abc,def is a multiple of 76,923.