1205240312 has 16 divisors (see below), whose sum is σ = 2264325840. Its totient is φ = 601420096.

The previous prime is 1205240269. The next prime is 1205240327. The reversal of 1205240312 is 2130425021.

It is a congruent 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, 145733 + ... + 153780.

It is an arithmetic number, because the mean of its divisors is an integer number (141520365).

Almost surely, 2^1205240312 is an apocalyptic number.

It is an amenable number.

1205240312 is a deficient number, since it is larger than the sum of its proper divisors (1059085528).

1205240312 is a wasteful number, since it uses less digits than its factorization.

1205240312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300022 (or 300018 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1205240312 is about 34716.5711440517. The cubic root of 1205240312 is about 1064.2031736494.

Adding to 1205240312 its reverse (2130425021), we get a palindrome (3335665333).

The spelling of 1205240312 in words is "one billion, two hundred five million, two hundred forty thousand, three hundred twelve".