Compare 640121 vs 640249

Property	640121	640249
Type	prime	prime
Unique factors	1	1
Total factors	1	1
Prime factorization	640121¹	640249¹
Prime factorization	640121	640249
Divisors count	2	2
Divisors	1, 640121	1, 640249
Number of properties	4	3
Chen primes	20382nd
Isolated primes	40823rd
Primes	52086th	52098th
Sexy primes (1st member)	11286th
Twin primes (2nd member)		5635th
Ulam primes		3819th
Roman numberals
Base 2	10011100010001111001₂	10011100010011111001₂
Base 3	1012112002012₃	1012112020221₃
Base 4	2130101321₄	2130103321₄
Base 5	130440441₅	130441444₅
Base 6	21415305₆	21420041₆
Base 7	5304146₇	5304421₇
Base 8	2342171₈	2342371₈
Base 9	1175065₉	1175227₉
Base 10	640121₁₀	640249₁₀
Base 11	3a7a29₁₁	3a8035₁₁
Base 12	26a535₁₂	26a621₁₂
Base 13	195491₁₃	19555c₁₃
Base 14	1293cd₁₄	129481₁₄
Base 15	c99eb₁₅	c9a84₁₅
Base 16	9c479₁₆	9c4f9₁₆