17085921 has 16 divisors (see below), whose sum is σ = 24541440. Its totient is φ = 10538640.

The previous prime is 17085911. The next prime is 17085967. The reversal of 17085921 is 12958071.

It is not a de Polignac number, because 17085921 - 2⁷ = 17085793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (17085911) 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 15 ways as a sum of consecutive naturals, for example, 1035 + ... + 5936.

It is an arithmetic number, because the mean of its divisors is an integer number (1533840).

Almost surely, 2^17085921 is an apocalyptic number.

It is an amenable number.

17085921 is a deficient number, since it is larger than the sum of its proper divisors (7455519).

17085921 is a wasteful number, since it uses less digits than its factorization.

17085921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7036.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 17085921 is about 4133.5119450656. The cubic root of 17085921 is about 257.5606216651.

The spelling of 17085921 in words is "seventeen million, eighty-five thousand, nine hundred twenty-one".