254 (number)
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| 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 even number.
- Is a Composite number with four divisors: 1, 2, 127 and 254. Since the sum of its divisors (excluding the same number) is 130 <254, is a defective number.
- It is a semiprime number.
- It is a Square-free integer.
- It is a number nontotient.
- It is a Thue–Morse sequence.
- It is the maximum number of regions in which a plane can be divided by 22 lines.
- It is part of the Pythagorean triad (254, 16128, 16130).
- It is a congruent number.
In other fields
- 254 nm is one of the wavelengths emitted by a mercury-vapor lamp
References
This article is issued from
Wikipedia.
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