870945 has 16 divisors (see below), whose sum is σ = 1439232. Its totient is φ = 449280.

The previous prime is 870931. The next prime is 870953. The reversal of 870945 is 549078.

It is not a de Polignac number, because 870945 - 2⁴ = 870929 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 472 + ... + 1401.

It is an arithmetic number, because the mean of its divisors is an integer number (89952).

2⁸⁷⁰⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

870945 is a deficient number, since it is larger than the sum of its proper divisors (568287).

870945 is a wasteful number, since it uses less digits than its factorization.

870945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 870945 is about 933.2443409954. The cubic root of 870945 is about 95.4985791479.

The spelling of 870945 in words is "eight hundred seventy thousand, nine hundred forty-five".