Compare 640255 vs 640261

Property	640255	640261
Type	composite number	prime
Unique factors	4	1
Total factors	4	1
Prime factorization	5¹ × 7¹ × 11¹ × 1663¹	640261¹
Prime factorization	5 × 7 × 11 × 1663	640261
Divisors count	16	2
Divisors	1, 5, 7, 11, 35, 55, 77, 385, 1663, 8315, 11641, 18293, 58205, 91465, 128051, 640255	1, 640261
Number of properties	0	5
Additive primes		20363rd
Lucky primes		5980th
Primes		52100th
Sexy primes (1st member)		11288th
Twin primes (2nd member)		5636th
Roman numberals
Base 2	10011100010011111111₂	10011100010100000101₂
Base 3	1012112021011₃	1012112021101₃
Base 4	2130103333₄	2130110011₄
Base 5	130442010₅	130442021₅
Base 6	21420051₆	21420101₆
Base 7	5304430₇	5304436₇
Base 8	2342377₈	2342405₈
Base 9	1175234₉	1175241₉
Base 10	640255₁₀	640261₁₀
Base 11	3a8040₁₁	3a8046₁₁
Base 12	26a627₁₂	26a631₁₂
Base 13	195565₁₃	19556b₁₃
Base 14	129487₁₄	12948d₁₄
Base 15	c9a8a₁₅	c9a91₁₅
Base 16	9c4ff₁₆	9c505₁₆