1205133215 has 32 divisors (see below), whose sum is σ = 1753823232. Its totient is φ = 782928000.

The previous prime is 1205133169. The next prime is 1205133257. The reversal of 1205133215 is 5123315021.

It is a happy number.

It is not a de Polignac number, because 1205133215 - 2¹⁶ = 1205067679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5021 + ... + 49350.

It is an arithmetic number, because the mean of its divisors is an integer number (54806976).

Almost surely, 2^1205133215 is an apocalyptic number.

1205133215 is a deficient number, since it is larger than the sum of its proper divisors (548690017).

1205133215 is a wasteful number, since it uses less digits than its factorization.

1205133215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54431.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1205133215 is about 34715.0286619499. The cubic root of 1205133215 is about 1064.1716512102.

Adding to 1205133215 its reverse (5123315021), we get a palindrome (6328448236).

The spelling of 1205133215 in words is "one billion, two hundred five million, one hundred thirty-three thousand, two hundred fifteen".