3871115 has 4 divisors (see below), whose sum is σ = 4645344. Its totient is φ = 3096888.

The previous prime is 3871111. The next prime is 3871129. The reversal of 3871115 is 5111783.

3871115 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 an emirpimes, since its reverse is a distinct semiprime: 5111783 = 2089 ⋅2447.

It is a cyclic number.

It is not a de Polignac number, because 3871115 - 2² = 3871111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3871111) 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, 387107 + ... + 387116.

It is an arithmetic number, because the mean of its divisors is an integer number (1161336).

Almost surely, 2^3871115 is an apocalyptic number.

3871115 is a deficient number, since it is larger than the sum of its proper divisors (774229).

3871115 is an equidigital number, since it uses as much as digits as its factorization.

3871115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774228.

The product of its digits is 840, while the sum is 26.

The square root of 3871115 is about 1967.5149300577. The cubic root of 3871115 is about 157.0165236101.

Adding to 3871115 its reverse (5111783), we get a palindrome (8982898).

The spelling of 3871115 in words is "three million, eight hundred seventy-one thousand, one hundred fifteen".