871549 has 8 divisors (see below), whose sum is σ = 1048640. Its totient is φ = 707616.

The previous prime is 871531. The next prime is 871553. The reversal of 871549 is 945178.

It is a happy number.

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

It is not a de Polignac number, because 871549 - 2⁵ = 871517 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 (871589) 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, 3144 + ... + 3409.

It is an arithmetic number, because the mean of its divisors is an integer number (131080).

2⁸⁷¹⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

871549 is a deficient number, since it is larger than the sum of its proper divisors (177091).

871549 is a wasteful number, since it uses less digits than its factorization.

871549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6579.

The product of its digits is 10080, while the sum is 34.

The square root of 871549 is about 933.5678871941. The cubic root of 871549 is about 95.5206501218.

The spelling of 871549 in words is "eight hundred seventy-one thousand, five hundred forty-nine".