1205113133 has 32 divisors (see below), whose sum is σ = 1490976000. Its totient is φ = 951160320.

The previous prime is 1205113111. The next prime is 1205113157. The reversal of 1205113133 is 3313115021.

It is a cyclic number.

It is not a de Polignac number, because 1205113133 - 2¹⁸ = 1204850989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205113103) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 721223 + ... + 722891.

It is an arithmetic number, because the mean of its divisors is an integer number (46593000).

Almost surely, 2^1205113133 is an apocalyptic number.

It is an amenable number.

1205113133 is a deficient number, since it is larger than the sum of its proper divisors (285862867).

1205113133 is a wasteful number, since it uses less digits than its factorization.

1205113133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1845.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1205113133 is about 34714.7394200216. The cubic root of 1205113133 is about 1064.1657401586.

Adding to 1205113133 its reverse (3313115021), we get a palindrome (4518228154).

The spelling of 1205113133 in words is "one billion, two hundred five million, one hundred thirteen thousand, one hundred thirty-three".