11710721 has 12 divisors (see below), whose sum is σ = 13055280. Its totient is φ = 10417680.

The previous prime is 11710697. The next prime is 11710753. The reversal of 11710721 is 12701711.

It is not a de Polignac number, because 11710721 - 2²² = 7516417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11710693 and 11710702.

It is not an unprimeable number, because it can be changed into a prime (11710771) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30710 + ... + 31088.

It is an arithmetic number, because the mean of its divisors is an integer number (1087940).

Almost surely, 2^11710721 is an apocalyptic number.

11710721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11710721 is a deficient number, since it is larger than the sum of its proper divisors (1344559).

11710721 is an equidigital number, since it uses as much as digits as its factorization.

11710721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 443 counting only the distinct ones).

The product of its (nonzero) digits is 98, while the sum is 20.

The square root of 11710721 is about 3422.0930729599. The cubic root of 11710721 is about 227.0881879013.

The spelling of 11710721 in words is "eleven million, seven hundred ten thousand, seven hundred twenty-one".