1178985 has 16 divisors (see below), whose sum is σ = 1923264. Its totient is φ = 616512.

The previous prime is 1178981. The next prime is 1178993. The reversal of 1178985 is 5898711.

It is not a de Polignac number, because 1178985 - 2² = 1178981 is a prime.

1178985 is a lucky number.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1178981) 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, 54 + ... + 1536.

It is an arithmetic number, because the mean of its divisors is an integer number (120204).

2^1178985 is an apocalyptic number.

1178985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1178985 is a deficient number, since it is larger than the sum of its proper divisors (744279).

1178985 is a wasteful number, since it uses less digits than its factorization.

1178985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1544.

The product of its digits is 20160, while the sum is 39.

The square root of 1178985 is about 1085.8107569922. The cubic root of 1178985 is about 105.6418731725.

The spelling of 1178985 in words is "one million, one hundred seventy-eight thousand, nine hundred eighty-five".