10921705 has 8 divisors (see below), whose sum is σ = 13190472. Its totient is φ = 8681088.

The previous prime is 10921693. The next prime is 10921709. The reversal of 10921705 is 50712901.

It can be written as a sum of positive squares in 4 ways, for example, as 885481 + 10036224 = 941^2 + 3168^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10921705 - 2⁷ = 10921577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10921705.

It is not an unprimeable number, because it can be changed into a prime (10921709) 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 7 ways as a sum of consecutive naturals, for example, 6172 + ... + 7741.

It is an arithmetic number, because the mean of its divisors is an integer number (1648809).

Almost surely, 2^10921705 is an apocalyptic number.

It is an amenable number.

10921705 is a deficient number, since it is larger than the sum of its proper divisors (2268767).

10921705 is a wasteful number, since it uses less digits than its factorization.

10921705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14075.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 10921705 is about 3304.8002965384. The cubic root of 10921705 is about 221.8690960540.

The spelling of 10921705 in words is "ten million, nine hundred twenty-one thousand, seven hundred five".