3871965 has 8 divisors (see below), whose sum is σ = 6195168. Its totient is φ = 2065040.

The previous prime is 3871961. The next prime is 3871969. The reversal of 3871965 is 5691783.

It is an interprime number because it is at equal distance from previous prime (3871961) and next prime (3871969).

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

It is not a de Polignac number, because 3871965 - 2² = 3871961 is a prime.

It is a super-2 number, since 2×3871965² = 29984225922450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871961) 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, 129051 + ... + 129080.

It is an arithmetic number, because the mean of its divisors is an integer number (774396).

Almost surely, 2^3871965 is an apocalyptic number.

It is an amenable number.

3871965 is a deficient number, since it is larger than the sum of its proper divisors (2323203).

3871965 is a wasteful number, since it uses less digits than its factorization.

3871965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258139.

The product of its digits is 45360, while the sum is 39.

The square root of 3871965 is about 1967.7309267275. The cubic root of 3871965 is about 157.0280150691.

The spelling of 3871965 in words is "three million, eight hundred seventy-one thousand, nine hundred sixty-five".