8243121 has 4 divisors (see below), whose sum is σ = 10990832. Its totient is φ = 5495412.

The previous prime is 8243107. The next prime is 8243149. The reversal of 8243121 is 1213428.

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 not a de Polignac number, because 8243121 - 2⁹ = 8242609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8243101) 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, 1373851 + ... + 1373856.

It is an arithmetic number, because the mean of its divisors is an integer number (2747708).

Almost surely, 2^8243121 is an apocalyptic number.

It is an amenable number.

8243121 is a deficient number, since it is larger than the sum of its proper divisors (2747711).

8243121 is a wasteful number, since it uses less digits than its factorization.

8243121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747710.

The product of its digits is 384, while the sum is 21.

The square root of 8243121 is about 2871.0835933494. The cubic root of 8243121 is about 202.0058244244.

Adding to 8243121 its reverse (1213428), we get a palindrome (9456549).

The spelling of 8243121 in words is "eight million, two hundred forty-three thousand, one hundred twenty-one".