1185065985 has 64 divisors (see below), whose sum is σ = 2003189760. Its totient is φ = 597507840.

The previous prime is 1185065977. The next prime is 1185065993. The reversal of 1185065985 is 5895605811.

It is an interprime number because it is at equal distance from previous prime (1185065977) and next prime (1185065993).

It is not a de Polignac number, because 1185065985 - 2³ = 1185065977 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5220442 + ... + 5220668.

It is an arithmetic number, because the mean of its divisors is an integer number (31299840).

Almost surely, 2^1185065985 is an apocalyptic number.

1185065985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1185065985 is a deficient number, since it is larger than the sum of its proper divisors (818123775).

1185065985 is a wasteful number, since it uses less digits than its factorization.

1185065985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478.

The product of its (nonzero) digits is 432000, while the sum is 48.

The square root of 1185065985 is about 34424.7873631777. The cubic root of 1185065985 is about 1058.2318883207.

The spelling of 1185065985 in words is "one billion, one hundred eighty-five million, sixty-five thousand, nine hundred eighty-five".