1201205305 has 4 divisors (see below), whose sum is σ = 1441446372. Its totient is φ = 960964240.

The previous prime is 1201205287. The next prime is 1201205309. The reversal of 1201205305 is 5035021021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 582787881 + 618417424 = 24141^2 + 24868^2 .

It is not a de Polignac number, because 1201205305 - 2⁹ = 1201204793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1201205309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120120526 + ... + 120120535.

It is an arithmetic number, because the mean of its divisors is an integer number (360361593).

Almost surely, 2^1201205305 is an apocalyptic number.

It is an amenable number.

1201205305 is a deficient number, since it is larger than the sum of its proper divisors (240241067).

1201205305 is an equidigital number, since it uses as much as digits as its factorization.

1201205305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240241066.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1201205305 is about 34658.4088642280. The cubic root of 1201205305 is about 1063.0142355981.

Adding to 1201205305 its reverse (5035021021), we get a palindrome (6236226326).

The spelling of 1201205305 in words is "one billion, two hundred one million, two hundred five thousand, three hundred five".