16685121 has 8 divisors (see below), whose sum is σ = 23014080. Its totient is φ = 10739792.

The previous prime is 16685117. The next prime is 16685129. The reversal of 16685121 is 12158661.

16685121 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 16685121 - 2² = 16685117 is a prime.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16685129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95805 + ... + 95978.

It is an arithmetic number, because the mean of its divisors is an integer number (2876760).

Almost surely, 2^16685121 is an apocalyptic number.

It is an amenable number.

16685121 is a deficient number, since it is larger than the sum of its proper divisors (6328959).

16685121 is a wasteful number, since it uses less digits than its factorization.

16685121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191815.

The product of its digits is 2880, while the sum is 30.

The square root of 16685121 is about 4084.7424643422. The cubic root of 16685121 is about 255.5307208871.

The spelling of 16685121 in words is "sixteen million, six hundred eighty-five thousand, one hundred twenty-one".