16685122 has 4 divisors (see below), whose sum is σ = 25027686. Its totient is φ = 8342560.

The previous prime is 16685117. The next prime is 16685129. The reversal of 16685122 is 22158661.

16685122 is digitally balanced in base 2, 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, and also an emirpimes, since its reverse is a distinct semiprime: 22158661 = 7 ⋅3165523.

It can be written as a sum of positive squares in only one way, i.e., 14371681 + 2313441 = 3791^2 + 1521^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 4171279 + ... + 4171282.

Almost surely, 2^16685122 is an apocalyptic number.

16685122 is a deficient number, since it is larger than the sum of its proper divisors (8342564).

16685122 is an equidigital number, since it uses as much as digits as its factorization.

16685122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8342563.

The product of its digits is 5760, while the sum is 31.

The square root of 16685122 is about 4084.7425867489. The cubic root of 16685122 is about 255.5307259921.

It can be divided in two parts, 16685 and 122, that added together give a 5-th power (16807 = 7⁵).

The spelling of 16685122 in words is "sixteen million, six hundred eighty-five thousand, one hundred twenty-two".