870355 has 4 divisors (see below), whose sum is σ = 1044432. Its totient is φ = 696280.

The previous prime is 870341. The next prime is 870367. The reversal of 870355 is 553078.

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

It is not a de Polignac number, because 870355 - 2⁵ = 870323 is a prime.

It is a Duffinian number.

870355 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87031 + ... + 87040.

It is an arithmetic number, because the mean of its divisors is an integer number (261108).

2⁸⁷⁰³⁵⁵ is an apocalyptic number.

870355 is a deficient number, since it is larger than the sum of its proper divisors (174077).

870355 is a wasteful number, since it uses less digits than its factorization.

870355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174076.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 870355 is about 932.9281858750. The cubic root of 870355 is about 95.4770098986.

It can be divided in two parts, 870 and 355, that added together give a triangular number (1225 = T₄₉).

The spelling of 870355 in words is "eight hundred seventy thousand, three hundred fifty-five".