1205320115 has 16 divisors (see below), whose sum is σ = 1458259200. Its totient is φ = 956371680.

The previous prime is 1205320079. The next prime is 1205320133. The reversal of 1205320115 is 5110235021.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1205320115 is a prime.

It is a super-2 number, since 2×1205320115² = 2905593159247226450, which contains 22 as substring.

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, 343520 + ... + 347010.

It is an arithmetic number, because the mean of its divisors is an integer number (91141200).

Almost surely, 2^1205320115 is an apocalyptic number.

1205320115 is a deficient number, since it is larger than the sum of its proper divisors (252939085).

1205320115 is a wasteful number, since it uses less digits than its factorization.

1205320115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 1205320115 is about 34717.7204752847. The cubic root of 1205320115 is about 1064.2266612838.

Adding to 1205320115 its reverse (5110235021), we get a palindrome (6315555136).

It can be divided in two parts, 120 and 5320115, that added together give a palindrome (5320235).

The spelling of 1205320115 in words is "one billion, two hundred five million, three hundred twenty thousand, one hundred fifteen".