3865161 has 8 divisors (see below), whose sum is σ = 5202144. Its totient is φ = 2552480.

The previous prime is 3865157. The next prime is 3865187. The reversal of 3865161 is 1615683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3865161 - 2² = 3865157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3865361) 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 7 ways as a sum of consecutive naturals, for example, 5700 + ... + 6341.

It is an arithmetic number, because the mean of its divisors is an integer number (650268).

Almost surely, 2^3865161 is an apocalyptic number.

It is an amenable number.

3865161 is a deficient number, since it is larger than the sum of its proper divisors (1336983).

3865161 is a wasteful number, since it uses less digits than its factorization.

3865161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12151.

The product of its digits is 4320, while the sum is 30.

The square root of 3865161 is about 1966.0012716171. The cubic root of 3865161 is about 156.9359821219.

The spelling of 3865161 in words is "three million, eight hundred sixty-five thousand, one hundred sixty-one".