821695 has 16 divisors (see below), whose sum is σ = 1194048. Its totient is φ = 529920.

The previous prime is 821677. The next prime is 821741. The reversal of 821695 is 596128.

It is not a de Polignac number, because 821695 - 2⁵ = 821663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96 + ... + 1285.

It is an arithmetic number, because the mean of its divisors is an integer number (74628).

2⁸²¹⁶⁹⁵ is an apocalyptic number.

821695 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

821695 is a deficient number, since it is larger than the sum of its proper divisors (372353).

821695 is a wasteful number, since it uses less digits than its factorization.

821695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410.

The product of its digits is 4320, while the sum is 31.

The square root of 821695 is about 906.4739378493. The cubic root of 821695 is about 93.6634638509.

The spelling of 821695 in words is "eight hundred twenty-one thousand, six hundred ninety-five".