870705 has 24 divisors (see below), whose sum is σ = 1647360. Its totient is φ = 421920.

The previous prime is 870703. The next prime is 870731. The reversal of 870705 is 507078.

It is not a de Polignac number, because 870705 - 2¹ = 870703 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (870703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385 + ... + 1374.

It is an arithmetic number, because the mean of its divisors is an integer number (68640).

2⁸⁷⁰⁷⁰⁵ is an apocalyptic number.

It is an amenable number.

870705 is a deficient number, since it is larger than the sum of its proper divisors (776655).

870705 is a wasteful number, since it uses less digits than its factorization.

870705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781 (or 1778 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 870705 is about 933.1157484471. The cubic root of 870705 is about 95.4898063917.

The spelling of 870705 in words is "eight hundred seventy thousand, seven hundred five".