3920161 has 4 divisors (see below), whose sum is σ = 4480192. Its totient is φ = 3360132.

The previous prime is 3920153. The next prime is 3920177. The reversal of 3920161 is 1610293.

3920161 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3920161 - 2³ = 3920153 is a prime.

It is a Duffinian number.

3920161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3920131) 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, 280005 + ... + 280018.

It is an arithmetic number, because the mean of its divisors is an integer number (1120048).

Almost surely, 2^3920161 is an apocalyptic number.

It is an amenable number.

3920161 is a deficient number, since it is larger than the sum of its proper divisors (560031).

3920161 is an equidigital number, since it uses as much as digits as its factorization.

3920161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560030.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 3920161 is about 1979.9396455448. The cubic root of 3920161 is about 157.6768618743.

The spelling of 3920161 in words is "three million, nine hundred twenty thousand, one hundred sixty-one".