10340721 has 24 divisors (see below), whose sum is σ = 15375360. Its totient is φ = 6695136.

The previous prime is 10340717. The next prime is 10340741. The reversal of 10340721 is 12704301.

It is not a de Polignac number, because 10340721 - 2² = 10340717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10340694 and 10340703.

It is not an unprimeable number, because it can be changed into a prime (10340741) 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, 81360 + ... + 81486.

It is an arithmetic number, because the mean of its divisors is an integer number (640640).

Almost surely, 2^10340721 is an apocalyptic number.

It is an amenable number.

10340721 is a deficient number, since it is larger than the sum of its proper divisors (5034639).

10340721 is a wasteful number, since it uses less digits than its factorization.

10340721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 10340721 is about 3215.6991463755. The cubic root of 10340721 is about 217.8630638490.

The spelling of 10340721 in words is "ten million, three hundred forty thousand, seven hundred twenty-one".