Subtracting from 2047 its product of nonzero digits (56), we obtain a palindrome (1991).
Adding to 2047 its reverse (7402), we get a palindrome (9449).
2047 is nontrivially palindromic in base 2.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7402 = 2 ⋅3701.
It is a 4-Lehmer number, since φ(2047) divides (2047-1)4.
It is a cyclic number.
It is a Duffinian number.
2047 is a nontrivial repdigit in base 2.
It is a plaindrome in base 2, base 4, base 8, base 12 and base 16.
It is a nialpdrome in base 2 and base 14.
It is a zygodrome in base 2.
It is a congruent number.
Being equal to 8×28-1, it is a Woodall number.
It is a Poulet number, since it divides 22046-1.
22047 is an apocalyptic number.
2047 is the 23-rd decagonal number.
2047 is an equidigital number, since it uses as much as digits as its factorization.
2047 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 112.
The square root of 2047 is about 45.2437841035. The cubic root of 2047 is about 12.6971411508.
The spelling of 2047 in words is "two thousand, forty-seven", and thus it is an iban number.