Compare 640249 vs 640261

Property	640249	640261
Type	prime	prime
Unique factors	1	1
Total factors	1	1
Prime factorization	640249¹	640261¹
Prime factorization	640249	640261
Divisors count	2	2
Divisors	1, 640249	1, 640261
Number of properties	3	5
Additive primes		20363rd
Lucky primes		5980th
Primes	52098th	52100th
Sexy primes (1st member)		11288th
Twin primes (2nd member)	5635th	5636th
Ulam primes	3819th
Roman numberals
Base 2	10011100010011111001₂	10011100010100000101₂
Base 3	1012112020221₃	1012112021101₃
Base 4	2130103321₄	2130110011₄
Base 5	130441444₅	130442021₅
Base 6	21420041₆	21420101₆
Base 7	5304421₇	5304436₇
Base 8	2342371₈	2342405₈
Base 9	1175227₉	1175241₉
Base 10	640249₁₀	640261₁₀
Base 11	3a8035₁₁	3a8046₁₁
Base 12	26a621₁₂	26a631₁₂
Base 13	19555c₁₃	19556b₁₃
Base 14	129481₁₄	12948d₁₄
Base 15	c9a84₁₅	c9a91₁₅
Base 16	9c4f9₁₆	9c505₁₆