10871721 has 24 divisors (see below), whose sum is σ = 19004544. Its totient is φ = 5846400.

The previous prime is 10871719. The next prime is 10871767. The reversal of 10871721 is 12717801.

It is not a de Polignac number, because 10871721 - 2¹ = 10871719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10871771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4005 + ... + 6146.

It is an arithmetic number, because the mean of its divisors is an integer number (791856).

Almost surely, 2^10871721 is an apocalyptic number.

It is an amenable number.

10871721 is a deficient number, since it is larger than the sum of its proper divisors (8132823).

10871721 is a wasteful number, since it uses less digits than its factorization.

10871721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10181 (or 10178 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 10871721 is about 3297.2292913900. The cubic root of 10871721 is about 221.5301115587.

The spelling of 10871721 in words is "ten million, eight hundred seventy-one thousand, seven hundred twenty-one".