870215 has 8 divisors (see below), whose sum is σ = 1049760. Its totient is φ = 692512.

The previous prime is 870211. The next prime is 870223. The reversal of 870215 is 512078.

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 870215 - 2² = 870211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1022 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (131220).

2⁸⁷⁰²¹⁵ is an apocalyptic number.

870215 is a deficient number, since it is larger than the sum of its proper divisors (179545).

870215 is a wasteful number, since it uses less digits than its factorization.

870215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 870215 is about 932.8531502868. The cubic root of 870215 is about 95.4718903408.

The spelling of 870215 in words is "eight hundred seventy thousand, two hundred fifteen".