Properties of the number 2945:
2945 = 5 × 19 × 31 is a sphenic number and squarefree.2945 has 3 distinct prime factors, 8 divisors, 15 antidivisors and 2160 totatives.
2945 has an oblong digit sum 20 in base 10.
2945 = 14732 - 14722 = 2972 - 2922 = 872 - 682 = 632 - 322 is the difference of 2 nonnegative squares in 4 ways.
2945 is the difference of 2 positive pentagonal numbers in 3 ways.
2945 = 22 + 52 + 542 is the sum of 3 positive squares.
29452 = 17672 + 23562 is the sum of 2 positive squares in 1 way.
29452 is the sum of 3 positive squares.
2945 is a divisor of 18612 - 1.
2945 is palindromic in (at least) the following bases: 46, 94, -64, and -92.
2945 in base 20 = 775 and consists of only the digits '5' and '7'.
2945 in base 45 = 1KK and consists of only the digits '1' and 'K'.
2945 in base 46 = 1I1 and consists of only the digits '1' and 'I'.