1206113305 has 4 divisors (see below), whose sum is σ = 1447335972. Its totient is φ = 964890640.

The previous prime is 1206113299. The next prime is 1206113317. The reversal of 1206113305 is 5033116021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5033116021 = 223 ⋅22570027.

It can be written as a sum of positive squares in 2 ways, for example, as 487658889 + 718454416 = 22083^2 + 26804^2 .

It is not a de Polignac number, because 1206113305 - 2⁷ = 1206113177 is a prime.

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, 120611326 + ... + 120611335.

It is an arithmetic number, because the mean of its divisors is an integer number (361833993).

Almost surely, 2^1206113305 is an apocalyptic number.

It is an amenable number.

1206113305 is a deficient number, since it is larger than the sum of its proper divisors (241222667).

1206113305 is an equidigital number, since it uses as much as digits as its factorization.

1206113305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241222666.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1206113305 is about 34729.1420135885. The cubic root of 1206113305 is about 1064.4600567763.

Adding to 1206113305 its reverse (5033116021), we get a palindrome (6239229326).

The spelling of 1206113305 in words is "one billion, two hundred six million, one hundred thirteen thousand, three hundred five".