1163985 has 16 divisors (see below), whose sum is σ = 1889664. Its totient is φ = 611712.

The previous prime is 1163977. The next prime is 1163989. The reversal of 1163985 is 5893611.

It is not a de Polignac number, because 1163985 - 2³ = 1163977 is a prime.

It is a super-2 number, since 2×1163985² = 2709722160450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1163989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 564 + ... + 1626.

It is an arithmetic number, because the mean of its divisors is an integer number (118104).

2^1163985 is an apocalyptic number.

1163985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1163985 is a deficient number, since it is larger than the sum of its proper divisors (725679).

1163985 is a wasteful number, since it uses less digits than its factorization.

1163985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144.

The product of its digits is 6480, while the sum is 33.

The square root of 1163985 is about 1078.8813651185. The cubic root of 1163985 is about 105.1919391723.

It can be divided in two parts, 116398 and 5, that added together give a triangular number (116403 = T₄₈₂).

The spelling of 1163985 in words is "one million, one hundred sixty-three thousand, nine hundred eighty-five".