120842417 has 2 divisors, whose sum is σ = 120842418. Its totient is φ = 120842416.

The previous prime is 120842411. The next prime is 120842419. The reversal of 120842417 is 714248021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120143521 + 698896 = 10961^2 + 836^2 .

It is an emirp because it is prime and its reverse (714248021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120842417 - 2⁶ = 120842353 is a prime.

Together with 120842419, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120842417.

It is not a weakly prime, because it can be changed into another prime (120842411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60421208 + 60421209.

It is an arithmetic number, because the mean of its divisors is an integer number (60421209).

Almost surely, 2^120842417 is an apocalyptic number.

It is an amenable number.

120842417 is a deficient number, since it is larger than the sum of its proper divisors (1).

120842417 is an equidigital number, since it uses as much as digits as its factorization.

120842417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 120842417 is about 10992.8348027249. The cubic root of 120842417 is about 494.3939349864.

The spelling of 120842417 in words is "one hundred twenty million, eight hundred forty-two thousand, four hundred seventeen".