1200118665 has 8 divisors (see below), whose sum is σ = 1920189888. Its totient is φ = 640063280.

The previous prime is 1200118657. The next prime is 1200118669. The reversal of 1200118665 is 5668110021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1200118665 - 2³ = 1200118657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200118669) 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, 40003941 + ... + 40003970.

It is an arithmetic number, because the mean of its divisors is an integer number (240023736).

Almost surely, 2^1200118665 is an apocalyptic number.

1200118665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1200118665 is a deficient number, since it is larger than the sum of its proper divisors (720071223).

1200118665 is an equidigital number, since it uses as much as digits as its factorization.

1200118665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80007919.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 1200118665 is about 34642.7288907788. The cubic root of 1200118665 is about 1062.6935959112.

Adding to 1200118665 its reverse (5668110021), we get a palindrome (6868228686).

The spelling of 1200118665 in words is "one billion, two hundred million, one hundred eighteen thousand, six hundred sixty-five".