821096 has 16 divisors (see below), whose sum is σ = 1550340. Its totient is φ = 407680.

The previous prime is 821089. The next prime is 821099. The reversal of 821096 is 690128.

It can be written as a sum of positive squares in 2 ways, for example, as 784996 + 36100 = 886^2 + 190^2 .

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 821096.

It is not an unprimeable number, because it can be changed into a prime (821099) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316 + ... + 1836.

2⁸²¹⁰⁹⁶ is an apocalyptic number.

It is an amenable number.

821096 is a deficient number, since it is larger than the sum of its proper divisors (729244).

821096 is a wasteful number, since it uses less digits than its factorization.

821096 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 720 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 821096 is about 906.1434764981. The cubic root of 821096 is about 93.6406986913.

The spelling of 821096 in words is "eight hundred twenty-one thousand, ninety-six".