120205145 has 8 divisors (see below), whose sum is σ = 149220360. Its totient is φ = 92848000.

The previous prime is 120205139. The next prime is 120205159. The reversal of 120205145 is 541502021.

It can be written as a sum of positive squares in 4 ways, for example, as 17547721 + 102657424 = 4189^2 + 10132^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-120205145 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 414356 + ... + 414645.

It is an arithmetic number, because the mean of its divisors is an integer number (18652545).

Almost surely, 2^120205145 is an apocalyptic number.

It is an amenable number.

120205145 is a deficient number, since it is larger than the sum of its proper divisors (29015215).

120205145 is an equidigital number, since it uses as much as digits as its factorization.

120205145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829035.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 120205145 is about 10963.8106970159. The cubic root of 120205145 is about 493.5233276695.

Adding to 120205145 its reverse (541502021), we get a palindrome (661707166).

The spelling of 120205145 in words is "one hundred twenty million, two hundred five thousand, one hundred forty-five".