821038 has 4 divisors (see below), whose sum is σ = 1231560. Its totient is φ = 410518.

The previous prime is 821027. The next prime is 821039. The reversal of 821038 is 830128.

821038 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205258 + ... + 205261.

It is an arithmetic number, because the mean of its divisors is an integer number (307890).

2⁸²¹⁰³⁸ is an apocalyptic number.

821038 is a deficient number, since it is larger than the sum of its proper divisors (410522).

821038 is a wasteful number, since it uses less digits than its factorization.

821038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410521.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 821038 is about 906.1114721711. Note that the first 3 decimals coincide. The cubic root of 821038 is about 93.6384937975.

The spelling of 821038 in words is "eight hundred twenty-one thousand, thirty-eight".