871617 has 4 divisors (see below), whose sum is σ = 1162160. Its totient is φ = 581076.

The previous prime is 871613. The next prime is 871621. The reversal of 871617 is 716178.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (871613) and next prime (871621).

It is not a de Polignac number, because 871617 - 2² = 871613 is a prime.

It is a D-number.

It is a Duffinian number.

871617 is a lucky number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 871617.

It is not an unprimeable number, because it can be changed into a prime (871613) 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, 145267 + ... + 145272.

It is an arithmetic number, because the mean of its divisors is an integer number (290540).

2⁸⁷¹⁶¹⁷ is an apocalyptic number.

It is an amenable number.

871617 is a deficient number, since it is larger than the sum of its proper divisors (290543).

871617 is a wasteful number, since it uses less digits than its factorization.

871617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290542.

The product of its digits is 2352, while the sum is 30.

The square root of 871617 is about 933.6043059027. The cubic root of 871617 is about 95.5231342947.

The spelling of 871617 in words is "eight hundred seventy-one thousand, six hundred seventeen".