1205303013 has 24 divisors (see below), whose sum is σ = 1761850688. Its totient is φ = 793945152.

The previous prime is 1205303003. The next prime is 1205303039. The reversal of 1205303013 is 3103035021.

1205303013 is a `hidden beast` number, since 120 + 530 + 3 + 0 + 13 = 666.

It is not a de Polignac number, because 1205303013 - 2⁴ = 1205302997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205303003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 505881 + ... + 508257.

Almost surely, 2^1205303013 is an apocalyptic number.

It is an amenable number.

1205303013 is a deficient number, since it is larger than the sum of its proper divisors (556547675).

1205303013 is a wasteful number, since it uses less digits than its factorization.

1205303013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3033 (or 3030 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 18.

The square root of 1205303013 is about 34717.4741736780. The cubic root of 1205303013 is about 1064.2216279071.

Adding to 1205303013 its reverse (3103035021), we get a palindrome (4308338034).

The spelling of 1205303013 in words is "one billion, two hundred five million, three hundred three thousand, thirteen".