120243217 has 2 divisors, whose sum is σ = 120243218.
Its totient is φ = 120243216.
The previous prime is 120243169. The next prime is 120243223. The reversal of 120243217 is 712342021.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 86881041 + 33362176 = 9321^2 + 5776^2
It is an emirp because it is prime and its reverse (712342021) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-120243217 is a prime.
It is not a weakly prime, because it can be changed into another prime (120243247) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60121608 + 60121609.
It is an arithmetic number, because the mean of its divisors is an integer number (60121609).
Almost surely, 2120243217 is an apocalyptic number.
It is an amenable number.
120243217 is a deficient number, since it is larger than the sum of its proper divisors (1).
120243217 is an equidigital number, since it uses as much as digits as its factorization.
120243217 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 672, while the sum is 22.
The square root of 120243217 is about 10965.5468171907.
The cubic root of 120243217 is about 493.5754259297.
Adding to 120243217 its reverse (712342021), we get a palindrome (832585238).
The spelling of 120243217 in words is "one hundred twenty million, two hundred forty-three thousand, two hundred seventeen".