870445 has 8 divisors (see below), whose sum is σ = 1054944. Its totient is φ = 689424.

The previous prime is 870437. The next prime is 870461. The reversal of 870445 is 544078.

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

It is a cyclic number.

It is not a de Polignac number, because 870445 - 2³ = 870437 is a prime.

It is a Duffinian number.

870445 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279 + ... + 1348.

It is an arithmetic number, because the mean of its divisors is an integer number (131868).

2⁸⁷⁰⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

870445 is a deficient number, since it is larger than the sum of its proper divisors (184499).

870445 is a wasteful number, since it uses less digits than its factorization.

870445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 870445 is about 932.9764198521. The cubic root of 870445 is about 95.4803007530.

The spelling of 870445 in words is "eight hundred seventy thousand, four hundred forty-five".