254 (number)
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Short description: Natural number
| ||||
|---|---|---|---|---|
| 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
- ↑ 1.0 1.1 "Is 254 a prime number?". https://www.numbers.education/254.html.
- ↑ 2.0 2.1 "A230956 - OEIS". https://oeis.org/A230956.
- ↑ "254 (Number)" (in en). https://metanumbers.com/254.
- ↑ 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/.
- ↑ "A005277 - OEIS". https://oeis.org/A005277.
- ↑ "A000124 - OEIS". https://oeis.org/A000124.
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