16685123 has 16 divisors (see below), whose sum is σ = 20669376. Its totient is φ = 13115520.

The previous prime is 16685117. The next prime is 16685129. The reversal of 16685123 is 32158661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16685117) and next prime (16685129).

It is a cyclic number.

It is not a de Polignac number, because 16685123 - 2¹⁰ = 16684099 is a prime.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 16685123.

It is not an unprimeable number, because it can be changed into a prime (16685129) 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 15 ways as a sum of consecutive naturals, for example, 15965 + ... + 16977.

It is an arithmetic number, because the mean of its divisors is an integer number (1291836).

Almost surely, 2^16685123 is an apocalyptic number.

16685123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

16685123 is a deficient number, since it is larger than the sum of its proper divisors (3984253).

16685123 is a wasteful number, since it uses less digits than its factorization.

16685123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214.

The product of its digits is 8640, while the sum is 32.

The square root of 16685123 is about 4084.7427091556. The cubic root of 16685123 is about 255.5307310970.

The spelling of 16685123 in words is "sixteen million, six hundred eighty-five thousand, one hundred twenty-three".