16005161 has 4 divisors (see below), whose sum is σ = 16244112. Its totient is φ = 15766212.

The previous prime is 16005151. The next prime is 16005169. The reversal of 16005161 is 16150061.

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: 16150061 = 509 ⋅31729.

It is a cyclic number.

It is not a de Polignac number, because 16005161 - 2²² = 11810857 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 (16005169) 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, 119375 + ... + 119508.

It is an arithmetic number, because the mean of its divisors is an integer number (4061028).

Almost surely, 2^16005161 is an apocalyptic number.

It is an amenable number.

16005161 is a deficient number, since it is larger than the sum of its proper divisors (238951).

16005161 is an equidigital number, since it uses as much as digits as its factorization.

16005161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238950.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 16005161 is about 4000.6450729851. The cubic root of 16005161 is about 252.0113006186.

The spelling of 16005161 in words is "sixteen million, five thousand, one hundred sixty-one".