8388121 has 4 divisors (see below), whose sum is σ = 9586432. Its totient is φ = 7189812.

The previous prime is 8388113. The next prime is 8388187. The reversal of 8388121 is 1218838.

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 8388121 - 2³ = 8388113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8388421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 599145 + ... + 599158.

It is an arithmetic number, because the mean of its divisors is an integer number (2396608).

Almost surely, 2^8388121 is an apocalyptic number.

It is an amenable number.

8388121 is a deficient number, since it is larger than the sum of its proper divisors (1198311).

8388121 is a wasteful number, since it uses less digits than its factorization.

8388121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1198310.

The product of its digits is 3072, while the sum is 31.

The square root of 8388121 is about 2896.2253020095. The cubic root of 8388121 is about 203.1834025674.

It can be divided in two parts, 8 and 388121, that added together give a square (388129 = 623²).

The spelling of 8388121 in words is "eight million, three hundred eighty-eight thousand, one hundred twenty-one".