254 (number) explained

Number:	254
Divisor:	1, 2, 127, 254

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]
• It is a semiprime number.^{[2] [3]} Moreover, in American English, its name has a semiprime number of syllables.
• It is a square-free integer.^[4]
• It is a nontotient.^[5]
• It is a lazy caterer number.^[6]
• It is a congruent number.

Notes and References

1. Web site: Is 254 a prime number?. 2021-07-29. www.numbers.education.
2. Web site: A230956 - OEIS. 2021-07-29. oeis.org.
3. Web site: 254 (Number). 2021-07-29. metanumbers.com. en.
4. Alter. Ronald. Curtz. Thaddeus B.. 1974. A note on congruent numbers. Mathematics of Computation. en. 28. 125. 303–305. 10.1090/S0025-5718-1974-0337758-9. 0025-5718. free.
5. Web site: A005277 - OEIS. 2021-07-29. oeis.org.
6. Web site: A000124 - OEIS. 2021-07-29. oeis.org.