1185985 has 8 divisors (see below), whose sum is σ = 1431720. Its totient is φ = 943104.

The previous prime is 1185979. The next prime is 1185997. The reversal of 1185985 is 5895811.

It can be written as a sum of positive squares in 4 ways, for example, as 294849 + 891136 = 543^2 + 944^2 .

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 1185985 - 2⁵ = 1185953 is a prime.

1185985 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351 + ... + 1579.

It is an arithmetic number, because the mean of its divisors is an integer number (178965).

2^1185985 is an apocalyptic number.

It is an amenable number.

1185985 is a deficient number, since it is larger than the sum of its proper divisors (245735).

1185985 is a wasteful number, since it uses less digits than its factorization.

1185985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427.

The product of its digits is 14400, while the sum is 37.

The square root of 1185985 is about 1089.0293843602. The cubic root of 1185985 is about 105.8505369489.

The spelling of 1185985 in words is "one million, one hundred eighty-five thousand, nine hundred eighty-five".