10678721 has 4 divisors (see below), whose sum is σ = 10853844. Its totient is φ = 10503600.

The previous prime is 10678711. The next prime is 10678751. The reversal of 10678721 is 12787601.

10678721 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 207025 + 10471696 = 455^2 + 3236^2 .

It is a cyclic number.

It is not a de Polignac number, because 10678721 - 2¹⁰ = 10677697 is a prime.

It is a super-2 number, since 2×10678721² = 228070164391682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (10678711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87470 + ... + 87591.

It is an arithmetic number, because the mean of its divisors is an integer number (2713461).

Almost surely, 2^10678721 is an apocalyptic number.

It is an amenable number.

10678721 is a deficient number, since it is larger than the sum of its proper divisors (175123).

10678721 is an equidigital number, since it uses as much as digits as its factorization.

10678721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175122.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 10678721 is about 3267.8312379926. The cubic root of 10678721 is about 220.2113739838.

The spelling of 10678721 in words is "ten million, six hundred seventy-eight thousand, seven hundred twenty-one".