1205500065 has 32 divisors (see below), whose sum is σ = 2404740096. Its totient is φ = 500986560.

The previous prime is 1205500033. The next prime is 1205500067. The reversal of 1205500065 is 5600055021.

It is not a de Polignac number, because 1205500065 - 2⁵ = 1205500033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1205500067) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 520707 + ... + 523016.

It is an arithmetic number, because the mean of its divisors is an integer number (75148128).

Almost surely, 2^1205500065 is an apocalyptic number.

1205500065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1205500065 is a deficient number, since it is larger than the sum of its proper divisors (1199240031).

1205500065 is a wasteful number, since it uses less digits than its factorization.

1205500065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043749.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1205500065 is about 34720.3119945659. The cubic root of 1205500065 is about 1064.2796203983.

Adding to 1205500065 its reverse (5600055021), we get a palindrome (6805555086).

The spelling of 1205500065 in words is "one billion, two hundred five million, five hundred thousand, sixty-five".