870745 has 4 divisors (see below), whose sum is σ = 1044900. Its totient is φ = 696592.

The previous prime is 870743. The next prime is 870773. The reversal of 870745 is 547078.

It is a happy number.

870745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 299209 + 571536 = 547^2 + 756^2 .

It is a cyclic number.

It is not a de Polignac number, because 870745 - 2¹ = 870743 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 (870743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87070 + ... + 87079.

It is an arithmetic number, because the mean of its divisors is an integer number (261225).

2⁸⁷⁰⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

870745 is a deficient number, since it is larger than the sum of its proper divisors (174155).

870745 is a wasteful number, since it uses less digits than its factorization.

870745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174154.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 870745 is about 933.1371817691. The cubic root of 870745 is about 95.4912686297.

The spelling of 870745 in words is "eight hundred seventy thousand, seven hundred forty-five".