1194205985 has 16 divisors (see below), whose sum is σ = 1639151616. Its totient is φ = 818192448.

The previous prime is 1194205981. The next prime is 1194205997. The reversal of 1194205985 is 5895024911.

It is a cyclic number.

It is not a de Polignac number, because 1194205985 - 2² = 1194205981 is a prime.

It is a super-2 number, since 2×1194205985² = 2852255869219640450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1194205981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29504 + ... + 57086.

It is an arithmetic number, because the mean of its divisors is an integer number (102446976).

Almost surely, 2^1194205985 is an apocalyptic number.

It is an amenable number.

1194205985 is a deficient number, since it is larger than the sum of its proper divisors (444945631).

1194205985 is a wasteful number, since it uses less digits than its factorization.

1194205985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28832.

The product of its (nonzero) digits is 129600, while the sum is 44.

The square root of 1194205985 is about 34557.2855560155. The cubic root of 1194205985 is about 1060.9455147859.

The spelling of 1194205985 in words is "one billion, one hundred ninety-four million, two hundred five thousand, nine hundred eighty-five".