4000871 has 8 divisors (see below), whose sum is σ = 4608384. Its totient is φ = 3402360.

The previous prime is 4000861. The next prime is 4000879. The reversal of 4000871 is 1780004.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4000871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4000879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1265 + ... + 3098.

It is an arithmetic number, because the mean of its divisors is an integer number (576048).

Almost surely, 2^4000871 is an apocalyptic number.

4000871 is a deficient number, since it is larger than the sum of its proper divisors (607513).

4000871 is a wasteful number, since it uses less digits than its factorization.

4000871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 4000871 is about 2000.2177381475. The cubic root of 4000871 is about 158.7516262466.

Adding to 4000871 its reverse (1780004), we get a palindrome (5780875).

The spelling of 4000871 in words is "four million, eight hundred seventy-one", and thus it is an aban number.