1205120330 has 16 divisors (see below), whose sum is σ = 2169677664. Its totient is φ = 481945680.

The previous prime is 1205120309. The next prime is 1205120333. The reversal of 1205120330 is 330215021.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1205120299 and 1205120308.

It is not an unprimeable number, because it can be changed into a prime (1205120333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52409 + ... + 71811.

It is an arithmetic number, because the mean of its divisors is an integer number (135604854).

Almost surely, 2^1205120330 is an apocalyptic number.

1205120330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1205120330 is a deficient number, since it is larger than the sum of its proper divisors (964557334).

1205120330 is a wasteful number, since it uses less digits than its factorization.

1205120330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25621.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 1205120330 is about 34714.8430790058. The cubic root of 1205120330 is about 1064.1678585726.

Adding to 1205120330 its reverse (330215021), we get a palindrome (1535335351).

The spelling of 1205120330 in words is "one billion, two hundred five million, one hundred twenty thousand, three hundred thirty".