6431871 has 4 divisors (see below), whose sum is σ = 8575832. Its totient is φ = 4287912.

The previous prime is 6431869. The next prime is 6431891. The reversal of 6431871 is 1781346.

It is a happy number.

6431871 is digitally balanced in base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6431871 - 2¹ = 6431869 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6431801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071976 + ... + 1071981.

It is an arithmetic number, because the mean of its divisors is an integer number (2143958).

Almost surely, 2^6431871 is an apocalyptic number.

6431871 is a deficient number, since it is larger than the sum of its proper divisors (2143961).

6431871 is a wasteful number, since it uses less digits than its factorization.

6431871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143960.

The product of its digits is 4032, while the sum is 30.

The square root of 6431871 is about 2536.1133649741. The cubic root of 6431871 is about 185.9712350014.

It can be divided in two parts, 6 and 431871, that multiplied together give a triangular number (2591226 = T₂₂₇₆).

The spelling of 6431871 in words is "six million, four hundred thirty-one thousand, eight hundred seventy-one".