871860841 has 4 divisors (see below), whose sum is σ = 872164692. Its totient is φ = 871556992.

The previous prime is 871860823. The next prime is 871860851. The reversal of 871860841 is 148068178.

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

It can be written as a sum of positive squares in 2 ways, for example, as 269649241 + 602211600 = 16421^2 + 24540^2 .

It is a cyclic number.

It is not a de Polignac number, because 871860841 - 2¹⁷ = 871729769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871860811) 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, 147580 + ... + 153373.

It is an arithmetic number, because the mean of its divisors is an integer number (218041173).

Almost surely, 2^871860841 is an apocalyptic number.

It is an amenable number.

871860841 is a deficient number, since it is larger than the sum of its proper divisors (303851).

871860841 is a wasteful number, since it uses less digits than its factorization.

871860841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303850.

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 871860841 is about 29527.2897672645. The cubic root of 871860841 is about 955.3204122090.

The spelling of 871860841 in words is "eight hundred seventy-one million, eight hundred sixty thousand, eight hundred forty-one".