1205540330 has 16 divisors (see below), whose sum is σ = 2174878944. Its totient is φ = 481125840.

The previous prime is 1205540269. The next prime is 1205540381. The reversal of 1205540330 is 330455021.

It is a junction number, because it is equal to n+sod(n) for n = 1205540296 and 1205540305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131636 + ... + 140495.

It is an arithmetic number, because the mean of its divisors is an integer number (135929934).

Almost surely, 2^1205540330 is an apocalyptic number.

1205540330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1205540330 is a deficient number, since it is larger than the sum of its proper divisors (969338614).

1205540330 is a wasteful number, since it uses less digits than its factorization.

1205540330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272581.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 1205540330 is about 34720.8918376242. The cubic root of 1205540330 is about 1064.2914696281.

Adding to 1205540330 its reverse (330455021), we get a palindrome (1535995351).

The spelling of 1205540330 in words is "one billion, two hundred five million, five hundred forty thousand, three hundred thirty".