16605201 has 4 divisors (see below), whose sum is σ = 22140272. Its totient is φ = 11070132.

The previous prime is 16605187. The next prime is 16605203. The reversal of 16605201 is 10250661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10250661 = 3 ⋅3416887.

It is a de Polignac number, because none of the positive numbers 2^k-16605201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16605203) 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 3 ways as a sum of consecutive naturals, for example, 2767531 + ... + 2767536.

It is an arithmetic number, because the mean of its divisors is an integer number (5535068).

Almost surely, 2^16605201 is an apocalyptic number.

It is an amenable number.

16605201 is a deficient number, since it is larger than the sum of its proper divisors (5535071).

16605201 is an equidigital number, since it uses as much as digits as its factorization.

16605201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535070.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 16605201 is about 4074.9479751280. The cubic root of 16605201 is about 255.1220791856.

Adding to 16605201 its reverse (10250661), we get a palindrome (26855862).

The spelling of 16605201 in words is "sixteen million, six hundred five thousand, two hundred one".