1. Numbers
  2. Compare 1283 vs 1285

Compare 1283 vs 1285

Property12831285
Typeprimesemiprime
Unique factors12
Total factors12
Prime factorization1283151 × 2571
Prime factorization12835 × 257
Divisors count24
Divisors1, 12831, 5, 257, 1285
Number of properties121
Chen primes135th 
Cousin primes (2nd member)46th 
Emirps61st 
Harmonic primes72nd 
Isolated primes123rd 
Left-truncatable primes56th 
Primes208th 
Prime triplets (3rd member)33rd 
Safe primes28th 
Semiprimes 378th
Sexy primes (1st member)90th 
Sexy primes (2nd member)89th 
Sexy prime triplets (2nd member)34th 
Roman numberalsMCCLXXXIIIMCCLXXXV
Base 2101000000112101000001012
Base 31202112312021213
Base 411000341100114
Base 5201135201205
Base 65535655416
Base 73512735147
Base 82403824058
Base 91675916779
Base 10128310128510
Base 11a6711a6911
Base 128ab128b112
Base 137791377b13
Base 146791467b14
Base 155a8155aa15
Base 165031650516
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