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122 (number)

From Wikipedia, the free encyclopedia
Natural number
← 121122 123 →
Cardinalone hundred twenty-two
Ordinal122nd
(one hundred twenty-second)
Factorization2 × 61
Divisors1, 2, 61, 122
Greek numeralΡΚΒ´
Roman numeralCXXII,cxxii
Binary11110102
Ternary111123
Senary3226
Octal1728
DuodecimalA212
Hexadecimal7A16

122 (one hundred [and] twenty-two) is the natural number following121 and preceding123.

In mathematics

[edit]

122 is anontotient since there is no integer with exactly 122coprimes below it. Nor is there an integer with exactly 122 integers with common factors below it, making 122 anoncototient.

122 is asemiprime.

φ(122) = φ(σ(122)).[1]

References

[edit]
  1. ^Sloane, N. J. A. (ed.)."Sequence A006872".TheOn-Line Encyclopedia of Integer Sequences. OEIS Foundation.
0 to 199
200 to 399
400 to 999
1000s and 10,000s
1000s
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