827215 has 4 divisors (see below), whose sum is σ = 992664. Its totient is φ = 661768.

The previous prime is 827213. The next prime is 827227. The reversal of 827215 is 512728.

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

It is a cyclic number.

It is not a de Polignac number, because 827215 - 2¹ = 827213 is a prime.

It is a d-powerful number, because it can be written as 8³ + 2 + 2⁵ + 7⁷ + 1 + 5⁵ .

It is a Duffinian number.

827215 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 827215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (827213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82717 + ... + 82726.

It is an arithmetic number, because the mean of its divisors is an integer number (248166).

2⁸²⁷²¹⁵ is an apocalyptic number.

827215 is a deficient number, since it is larger than the sum of its proper divisors (165449).

827215 is a wasteful number, since it uses less digits than its factorization.

827215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165448.

The product of its digits is 1120, while the sum is 25.

The square root of 827215 is about 909.5136062754. The cubic root of 827215 is about 93.8727340658.

The spelling of 827215 in words is "eight hundred twenty-seven thousand, two hundred fifteen".