1201110865 has 8 divisors (see below), whose sum is σ = 1459578240. Its totient is φ = 948725232.

The previous prime is 1201110863. The next prime is 1201110881. The reversal of 1201110865 is 5680111021.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1201110865 - 2¹ = 1201110863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1201110863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1519999 + ... + 1520788.

It is an arithmetic number, because the mean of its divisors is an integer number (182447280).

Almost surely, 2^1201110865 is an apocalyptic number.

It is an amenable number.

1201110865 is a deficient number, since it is larger than the sum of its proper divisors (258467375).

1201110865 is an equidigital number, since it uses as much as digits as its factorization.

1201110865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040871.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 1201110865 is about 34657.0463975221. The cubic root of 1201110865 is about 1062.9863764428.

Adding to 1201110865 its reverse (5680111021), we get a palindrome (6881221886).

The spelling of 1201110865 in words is "one billion, two hundred one million, one hundred ten thousand, eight hundred sixty-five".