120042161 has 2 divisors, whose sum is σ = 120042162. Its totient is φ = 120042160.

The previous prime is 120042127. The next prime is 120042193. The reversal of 120042161 is 161240021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71656225 + 48385936 = 8465^2 + 6956^2 .

It is a cyclic number.

It is not a de Polignac number, because 120042161 - 2¹⁰ = 120041137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120042101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60021080 + 60021081.

It is an arithmetic number, because the mean of its divisors is an integer number (60021081).

Almost surely, 2^120042161 is an apocalyptic number.

It is an amenable number.

120042161 is a deficient number, since it is larger than the sum of its proper divisors (1).

120042161 is an equidigital number, since it uses as much as digits as its factorization.

120042161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 120042161 is about 10956.3753586668. The cubic root of 120042161 is about 493.3001736396.

Adding to 120042161 its reverse (161240021), we get a palindrome (281282182).

The spelling of 120042161 in words is "one hundred twenty million, forty-two thousand, one hundred sixty-one".