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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 11,000,000.[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[edit]


  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
orders of magnitude
Succeeded by