Compare 421 vs 428

Property	421	428
Type	prime	composite number
Unique factors	1	2
Total factors	1	3
Prime factorization	421¹	2² × 107¹
Prime factorization	421	2 × 2 × 107
Divisors count	2	6
Divisors	1, 421	1, 2, 4, 107, 214, 428
Number of properties	6	0
Additive primes	48th
Centered square primes	8th
Lucky primes	23rd
Primes	82nd
Pythagorean primes	40th
Twin primes (2nd member)	22nd
Roman numberals	CDXXI	CDXXVIII
Base 2	110100101₂	110101100₂
Base 3	120121₃	120212₃
Base 4	12211₄	12230₄
Base 5	3141₅	3203₅
Base 6	1541₆	1552₆
Base 7	1141₇	1151₇
Base 8	645₈	654₈
Base 9	517₉	525₉
Base 10	421₁₀	428₁₀
Base 11	353₁₁	35a₁₁
Base 12	2b1₁₂	2b8₁₂
Base 13	265₁₃	26c₁₃
Base 14	221₁₄	228₁₄
Base 15	1d1₁₅	1d8₁₅
Base 16	1a5₁₆	1ac₁₆