1204205105 has 4 divisors (see below), whose sum is σ = 1445046132. Its totient is φ = 963364080.

The previous prime is 1204205083. The next prime is 1204205113. The reversal of 1204205105 is 5015024021.

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 165045409 + 1039159696 = 12847^2 + 32236^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1204205105 is a prime.

It is a super-2 number, since 2×1204205105² = 2900219869816122050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120420506 + ... + 120420515.

It is an arithmetic number, because the mean of its divisors is an integer number (361261533).

Almost surely, 2^1204205105 is an apocalyptic number.

It is an amenable number.

1204205105 is a deficient number, since it is larger than the sum of its proper divisors (240841027).

1204205105 is an equidigital number, since it uses as much as digits as its factorization.

1204205105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240841026.

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

The square root of 1204205105 is about 34701.6585338511. The cubic root of 1204205105 is about 1063.8983973237.

Adding to 1204205105 its reverse (5015024021), we get a palindrome (6219229126).

The spelling of 1204205105 in words is "one billion, two hundred four million, two hundred five thousand, one hundred five".