821295 has 12 divisors (see below), whose sum is σ = 1423656. Its totient is φ = 438000.

The previous prime is 821291. The next prime is 821297. The reversal of 821295 is 592128.

It is not a de Polignac number, because 821295 - 2² = 821291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9081 + ... + 9170.

It is an arithmetic number, because the mean of its divisors is an integer number (118638).

2⁸²¹²⁹⁵ is an apocalyptic number.

821295 is a deficient number, since it is larger than the sum of its proper divisors (602361).

821295 is a wasteful number, since it uses less digits than its factorization.

821295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18262 (or 18259 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 821295 is about 906.2532758561. The cubic root of 821295 is about 93.6482629688.

The spelling of 821295 in words is "eight hundred twenty-one thousand, two hundred ninety-five".