Millionth

One millionth is equal to 0.000 001, or 1 x 10⁻⁶ in scientific notation. It is the reciprocal of a million, and can be also written as 1⁄1,000,000.^[1] Units using this fraction can be indicated using the prefix "micro-" from Greek, meaning "small".^[2] Numbers of this quantity are expressed in terms of μ (the Greek letter mu).^[3]

"Millionth" can also mean the ordinal number that comes after the nine hundred, ninety-nine thousand, nine hundred, ninety-ninth and before the million and first.^[4]

See also

• International System of Units
• Micro-
• International Map of the World
• Order of magnitude (numbers)
• Order of magnitude
• Parts-per notation
• Per mille

References

1. Laidler, Keith J. (30 December 2011), Science and Sensibility: The Elegant Logic of the Universe, Prometheus Books, p. 15, ISBN 9781615927036.
2. The American Heritage Guide to Contemporary Usage and Style, Houghton Mifflin Company, 2005, p. 300, ISBN 9780618604999.
3. Handley, Brett; Coon, Craig; Marshall, David (2011), Principles of Engineering, Cengage Learning, p. 212, ISBN 9781435428362.
4. Hurford, James R. (1994), Grammar: A Student's Guide, Cambridge University Press, p. 146, ISBN 9780521456272.

Preceded by Thousandth

Decimal orders of magnitude

Succeeded by Billionth