1205540512 has 96 divisors (see below), whose sum is σ = 2681126784. Its totient is φ = 528768000.

The previous prime is 1205540503. The next prime is 1205540543. The reversal of 1205540512 is 2150455021.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1966318 + ... + 1966930.

It is an arithmetic number, because the mean of its divisors is an integer number (27928404).

Almost surely, 2^1205540512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1205540512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1340563392).

1205540512 is an abundant number, since it is smaller than the sum of its proper divisors (1475586272).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1205540512 is a wasteful number, since it uses less digits than its factorization.

1205540512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822 (or 814 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1205540512 is about 34720.8944585245. The cubic root of 1205540512 is about 1064.2915231867.

Adding to 1205540512 its reverse (2150455021), we get a palindrome (3355995533).

The spelling of 1205540512 in words is "one billion, two hundred five million, five hundred forty thousand, five hundred twelve".