3871431 has 12 divisors (see below), whose sum is σ = 5648760. Its totient is φ = 2554800.

The previous prime is 3871423. The next prime is 3871433. The reversal of 3871431 is 1341783.

It is not a de Polignac number, because 3871431 - 2³ = 3871423 is a prime.

It is a super-2 number, since 2×3871431² = 29975955975522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3871395 and 3871404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3871433) 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, 1221 + ... + 3038.

It is an arithmetic number, because the mean of its divisors is an integer number (470730).

Almost surely, 2^3871431 is an apocalyptic number.

3871431 is a deficient number, since it is larger than the sum of its proper divisors (1777329).

3871431 is a wasteful number, since it uses less digits than its factorization.

3871431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366 (or 4363 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 3871431 is about 1967.5952327651. The cubic root of 3871431 is about 157.0207959254.

The spelling of 3871431 in words is "three million, eight hundred seventy-one thousand, four hundred thirty-one".