3871591 has 8 divisors (see below), whose sum is σ = 3991680. Its totient is φ = 3752952.

The previous prime is 3871583. The next prime is 3871601. The reversal of 3871591 is 1951783.

It is a happy number.

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 3871591 - 2³ = 3871583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871501) 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, 7446 + ... + 7948.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

Almost surely, 2^3871591 is an apocalyptic number.

3871591 is a deficient number, since it is larger than the sum of its proper divisors (120089).

3871591 is a wasteful number, since it uses less digits than its factorization.

3871591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725.

The product of its digits is 7560, while the sum is 34.

The square root of 3871591 is about 1967.6358911140. The cubic root of 3871591 is about 157.0229590344.

The spelling of 3871591 in words is "three million, eight hundred seventy-one thousand, five hundred ninety-one".