8340121 has 2 divisors, whose sum is σ = 8340122. Its totient is φ = 8340120.

The previous prime is 8340119. The next prime is 8340127. The reversal of 8340121 is 1210438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7096896 + 1243225 = 2664^2 + 1115^2 .

It is a cyclic number.

It is not a de Polignac number, because 8340121 - 2¹ = 8340119 is a prime.

Together with 8340119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8340127) 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 as a sum of consecutive naturals, namely, 4170060 + 4170061.

It is an arithmetic number, because the mean of its divisors is an integer number (4170061).

Almost surely, 2^8340121 is an apocalyptic number.

It is an amenable number.

8340121 is a deficient number, since it is larger than the sum of its proper divisors (1).

8340121 is an equidigital number, since it uses as much as digits as its factorization.

8340121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 8340121 is about 2887.9267649994. The cubic root of 8340121 is about 202.7950968604.

Adding to 8340121 its reverse (1210438), we get a palindrome (9550559).

It can be divided in two parts, 83 and 40121, that added together give a palindrome (40204).

The spelling of 8340121 in words is "eight million, three hundred forty thousand, one hundred twenty-one".