870243 has 8 divisors (see below), whose sum is σ = 1265856. Its totient is φ = 527400.

The previous prime is 870241. The next prime is 870253. The reversal of 870243 is 342078.

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

It is not a de Polignac number, because 870243 - 2¹ = 870241 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (870241) 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 7 ways as a sum of consecutive naturals, for example, 13153 + ... + 13218.

It is an arithmetic number, because the mean of its divisors is an integer number (158232).

2⁸⁷⁰²⁴³ is an apocalyptic number.

870243 is a deficient number, since it is larger than the sum of its proper divisors (395613).

870243 is a wasteful number, since it uses less digits than its factorization.

870243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26385.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 870243 is about 932.8681578873. The cubic root of 870243 is about 95.4729142963.

The spelling of 870243 in words is "eight hundred seventy thousand, two hundred forty-three".