8202921 has 4 divisors (see below), whose sum is σ = 10937232. Its totient is φ = 5468612.

The previous prime is 8202919. The next prime is 8202949. The reversal of 8202921 is 1292028.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8202921 - 2¹ = 8202919 is a prime.

8202921 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 8202891 and 8202900.

It is not an unprimeable number, because it can be changed into a prime (8202221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1367151 + ... + 1367156.

It is an arithmetic number, because the mean of its divisors is an integer number (2734308).

Almost surely, 2^8202921 is an apocalyptic number.

It is an amenable number.

8202921 is a deficient number, since it is larger than the sum of its proper divisors (2734311).

8202921 is a wasteful number, since it uses less digits than its factorization.

8202921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2734310.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 8202921 is about 2864.0741959663. The cubic root of 8202921 is about 201.6769089198.

Adding to 8202921 its reverse (1292028), we get a palindrome (9494949).

It can be divided in two parts, 820 and 2921, that added together give a triangular number (3741 = T₈₆).

The spelling of 8202921 in words is "eight million, two hundred two thousand, nine hundred twenty-one".