821068 has 6 divisors (see below), whose sum is σ = 1436876. Its totient is φ = 410532.

The previous prime is 821063. The next prime is 821069. The reversal of 821068 is 860128.

It is not an unprimeable number, because it can be changed into a prime (821063) by changing a digit.

821068 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102630 + ... + 102637.

2⁸²¹⁰⁶⁸ is an apocalyptic number.

It is an amenable number.

821068 is a deficient number, since it is larger than the sum of its proper divisors (615808).

821068 is a wasteful number, since it uses less digits than its factorization.

821068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205271 (or 205269 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 821068 is about 906.1280262744. The cubic root of 821068 is about 93.6396342728.

Subtracting 821068 from its reverse (860128), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 821068 in words is "eight hundred twenty-one thousand, sixty-eight".