871243 has 4 divisors (see below), whose sum is σ = 873520. Its totient is φ = 868968.

The previous prime is 871231. The next prime is 871249. The reversal of 871243 is 342178.

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

It is a cyclic number.

It is not a de Polignac number, because 871243 - 2⁹ = 870731 is a prime.

It is a Duffinian number.

871243 is a lucky number.

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 3 ways as a sum of consecutive naturals, for example, 408 + ... + 1381.

It is an arithmetic number, because the mean of its divisors is an integer number (218380).

2⁸⁷¹²⁴³ is an apocalyptic number.

871243 is a deficient number, since it is larger than the sum of its proper divisors (2277).

871243 is a wasteful number, since it uses less digits than its factorization.

871243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2276.

The product of its digits is 1344, while the sum is 25.

The square root of 871243 is about 933.4039854211. The cubic root of 871243 is about 95.5094697443.

The spelling of 871243 in words is "eight hundred seventy-one thousand, two hundred forty-three".