871245 has 24 divisors (see below), whose sum is σ = 1591200. Its totient is φ = 439776.

The previous prime is 871231. The next prime is 871249. The reversal of 871245 is 542178.

871245 is nontrivially palindromic in base 16.

It is not a de Polignac number, because 871245 - 2⁴ = 871229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (871249) 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 23 ways as a sum of consecutive naturals, for example, 346 + ... + 1364.

It is an arithmetic number, because the mean of its divisors is an integer number (66300).

2⁸⁷¹²⁴⁵ is an apocalyptic number.

It is an amenable number.

871245 is a deficient number, since it is larger than the sum of its proper divisors (719955).

871245 is a wasteful number, since it uses less digits than its factorization.

871245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049 (or 1046 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 871245 is about 933.4050567680. The cubic root of 871245 is about 95.5095428272.

It can be divided in two parts, 8 and 71245, that added together give a triangular number (71253 = T₃₇₇).

The spelling of 871245 in words is "eight hundred seventy-one thousand, two hundred forty-five".