3871555 has 8 divisors (see below), whose sum is σ = 4709952. Its totient is φ = 3054528.

The previous prime is 3871547. The next prime is 3871579. The reversal of 3871555 is 5551783.

3871555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3871555 - 2³ = 3871547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3871555.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4939 + ... + 5668.

It is an arithmetic number, because the mean of its divisors is an integer number (588744).

Almost surely, 2^3871555 is an apocalyptic number.

3871555 is a deficient number, since it is larger than the sum of its proper divisors (838397).

3871555 is a wasteful number, since it uses less digits than its factorization.

3871555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10685.

The product of its digits is 21000, while the sum is 34.

The square root of 3871555 is about 1967.6267430588. The cubic root of 3871555 is about 157.0224723401.

The spelling of 3871555 in words is "three million, eight hundred seventy-one thousand, five hundred fifty-five".