801871 has 4 divisors (see below), whose sum is σ = 916432. Its totient is φ = 687312.

The previous prime is 801859. The next prime is 801883. The reversal of 801871 is 178108.

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

It is an interprime number because it is at equal distance from previous prime (801859) and next prime (801883).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-801871 is a prime.

It is an Ulam 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 (801811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57270 + ... + 57283.

It is an arithmetic number, because the mean of its divisors is an integer number (229108).

2⁸⁰¹⁸⁷¹ is an apocalyptic number.

801871 is a deficient number, since it is larger than the sum of its proper divisors (114561).

801871 is a wasteful number, since it uses less digits than its factorization.

801871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114560.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 801871 is about 895.4725009736. The cubic root of 801871 is about 92.9040904328.

Adding to 801871 its reverse (178108), we get a palindrome (979979).

The spelling of 801871 in words is "eight hundred one thousand, eight hundred seventy-one".