821926 has 12 divisors (see below), whose sum is σ = 1434348. Its totient is φ = 352212.

The previous prime is 821911. The next prime is 821939. The reversal of 821926 is 629128.

It is a happy number.

It is a plaindrome in base 12.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 821894 and 821903.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4096 + ... + 4291.

It is an arithmetic number, because the mean of its divisors is an integer number (119529).

2⁸²¹⁹²⁶ is an apocalyptic number.

821926 is a deficient number, since it is larger than the sum of its proper divisors (612422).

821926 is a wasteful number, since it uses less digits than its factorization.

821926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8403 (or 8396 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 821926 is about 906.6013456862. The cubic root of 821926 is about 93.6722401134.

The spelling of 821926 in words is "eight hundred twenty-one thousand, nine hundred twenty-six".