254 (number)

Short description: Natural number

| <- 253  | 254 |  255 ->

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← 250 251 252 253 254 255 256 257 258 259 →

List of numbers — Integers

← 0 100 200 300 400 500 600 700 800 900 →

Cardinal| two hundred fifty-four
Ordinal| 254th
(two hundred fifty-fourth)
Factorization| 2 × 127
Divisors| 1, 2, 127, 254
Greek numeral| ΣΝΔ´
Roman numeral| CCLIV
Binary| 111111102
Ternary| 1001023
Quaternary| 33324
Quinary| 20045
Senary| 11026
Octal| 3768
Duodecimal| 19212
Hexadecimal| FE16
Vigesimal| CE20
Base 36| 7236

254 (two hundred [and] fifty-four) is the natural number following 253 and preceding 255.

## In mathematics

* It is a deficient number, since the sum of its divisors (excluding the same number) is 130 < 254.[1][better source needed]
* It is a semiprime number.[2][3][1] Moreover, in American English, its name has a semiprime number of syllables.[2]
* It is a square-free integer.[4]
* It is a nontotient.[5]
* It is a lazy caterer number.[6]
* It is a congruent number.[4]

## References

1. ↑ 1.0 1.1 "Is 254 a prime number?". https://www.numbers.education/254.html.
2. ↑ 2.0 2.1 "A230956 - OEIS". https://oeis.org/A230956.
3. ↑ "254 (Number)" (in en). https://metanumbers.com/254.
4. ↑ 4.0 4.1 Alter, Ronald; Curtz, Thaddeus B. (1974). "A note on congruent numbers" (in en). Mathematics of Computation 28 (125): 303–305. doi:10.1090/S0025-5718-1974-0337758-9. ISSN 0025-5718. https://www.ams.org/mcom/1974-28-125/S0025-5718-1974-0337758-9/.
5. ↑ "A005277 - OEIS". https://oeis.org/A005277.
6. ↑ "A000124 - OEIS". https://oeis.org/A000124.

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