320142161 has 2 divisors, whose sum is σ = 320142162. Its totient is φ = 320142160.

The previous prime is 320142149. The next prime is 320142203. The reversal of 320142161 is 161241023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264550225 + 55591936 = 16265^2 + 7456^2 .

It is a cyclic number.

It is not a de Polignac number, because 320142161 - 2¹⁰ = 320141137 is a prime.

It is not a weakly prime, because it can be changed into another prime (320142131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160071080 + 160071081.

It is an arithmetic number, because the mean of its divisors is an integer number (160071081).

Almost surely, 2^320142161 is an apocalyptic number.

It is an amenable number.

320142161 is a deficient number, since it is larger than the sum of its proper divisors (1).

320142161 is an equidigital number, since it uses as much as digits as its factorization.

320142161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 320142161 is about 17892.5168995309. The cubic root of 320142161 is about 684.0916519629.

Adding to 320142161 its reverse (161241023), we get a palindrome (481383184).

The spelling of 320142161 in words is "three hundred twenty million, one hundred forty-two thousand, one hundred sixty-one".