3871215 has 12 divisors (see below), whose sum is σ = 6710184. Its totient is φ = 2064624.

The previous prime is 3871211. The next prime is 3871271. The reversal of 3871215 is 5121783.

It is not a de Polignac number, because 3871215 - 2² = 3871211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42969 + ... + 43058.

It is an arithmetic number, because the mean of its divisors is an integer number (559182).

Almost surely, 2^3871215 is an apocalyptic number.

3871215 is a deficient number, since it is larger than the sum of its proper divisors (2838969).

3871215 is a wasteful number, since it uses less digits than its factorization.

3871215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86038 (or 86035 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 3871215 is about 1967.5403426614. The cubic root of 3871215 is about 157.0178756338.

Adding to 3871215 its reverse (5121783), we get a palindrome (8992998).

It can be divided in two parts, 38 and 71215, that added together give a triangular number (71253 = T₃₇₇).

The spelling of 3871215 in words is "three million, eight hundred seventy-one thousand, two hundred fifteen".