1205019201 has 4 divisors (see below), whose sum is σ = 1606692272. Its totient is φ = 803346132.

The previous prime is 1205019199. The next prime is 1205019209. The reversal of 1205019201 is 1029105021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1205019201 - 2¹ = 1205019199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1205019209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200836531 + ... + 200836536.

It is an arithmetic number, because the mean of its divisors is an integer number (401673068).

Almost surely, 2^1205019201 is an apocalyptic number.

It is an amenable number.

1205019201 is a deficient number, since it is larger than the sum of its proper divisors (401673071).

1205019201 is an equidigital number, since it uses as much as digits as its factorization.

1205019201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401673070.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 1205019201 is about 34713.3864812985. The cubic root of 1205019201 is about 1064.1380908006.

The spelling of 1205019201 in words is "one billion, two hundred five million, nineteen thousand, two hundred one".