8239121 has 4 divisors (see below), whose sum is σ = 8988144. Its totient is φ = 7490100.

The previous prime is 8239117. The next prime is 8239139. The reversal of 8239121 is 1219328.

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 8239121 - 2² = 8239117 is a prime.

It is a super-2 number, since 2×8239121² = 135766229705282, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8239151) 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, 374495 + ... + 374516.

It is an arithmetic number, because the mean of its divisors is an integer number (2247036).

Almost surely, 2^8239121 is an apocalyptic number.

It is an amenable number.

8239121 is a deficient number, since it is larger than the sum of its proper divisors (749023).

8239121 is a wasteful number, since it uses less digits than its factorization.

8239121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749022.

The product of its digits is 864, while the sum is 26.

The square root of 8239121 is about 2870.3869077182. The cubic root of 8239121 is about 201.9731444871.

The spelling of 8239121 in words is "eight million, two hundred thirty-nine thousand, one hundred twenty-one".