3871971 has 12 divisors (see below), whose sum is σ = 5922072. Its totient is φ = 2429376.

The previous prime is 3871969. The next prime is 3872017. The reversal of 3871971 is 1791783.

It is not a de Polignac number, because 3871971 - 2¹ = 3871969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3871921) 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, 12501 + ... + 12806.

It is an arithmetic number, because the mean of its divisors is an integer number (493506).

Almost surely, 2^3871971 is an apocalyptic number.

3871971 is a deficient number, since it is larger than the sum of its proper divisors (2050101).

3871971 is a wasteful number, since it uses less digits than its factorization.

3871971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25330 (or 25327 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 3871971 is about 1967.7324513256. The cubic root of 3871971 is about 157.0280961793.

The spelling of 3871971 in words is "three million, eight hundred seventy-one thousand, nine hundred seventy-one".