120405317 has 2 divisors, whose sum is σ = 120405318. Its totient is φ = 120405316.

The previous prime is 120405301. The next prime is 120405331. The reversal of 120405317 is 713504021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116618401 + 3786916 = 10799^2 + 1946^2 .

It is an emirp because it is prime and its reverse (713504021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120405317 - 2⁴ = 120405301 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 120405292 and 120405301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120405367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60202658 + 60202659.

It is an arithmetic number, because the mean of its divisors is an integer number (60202659).

Almost surely, 2^120405317 is an apocalyptic number.

It is an amenable number.

120405317 is a deficient number, since it is larger than the sum of its proper divisors (1).

120405317 is an equidigital number, since it uses as much as digits as its factorization.

120405317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 120405317 is about 10972.9356600684. The cubic root of 120405317 is about 493.7971228432.

Adding to 120405317 its reverse (713504021), we get a palindrome (833909338).

The spelling of 120405317 in words is "one hundred twenty million, four hundred five thousand, three hundred seventeen".