1159986 has 16 divisors (see below), whose sum is σ = 2343744. Its totient is φ = 382704.

The previous prime is 1159981. The next prime is 1159993. The reversal of 1159986 is 6899511.

It is not an unprimeable number, because it can be changed into a prime (1159981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 321 + ... + 1556.

It is an arithmetic number, because the mean of its divisors is an integer number (146484).

2^1159986 is an apocalyptic number.

1159986 is an abundant number, since it is smaller than the sum of its proper divisors (1183758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1159986 is a wasteful number, since it uses less digits than its factorization.

1159986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985.

The product of its digits is 19440, while the sum is 39.

The square root of 1159986 is about 1077.0264620705. The cubic root of 1159986 is about 105.0713347457.

It can be divided in two parts, 1159 and 986, that added together give a triangular number (2145 = T₆₅).

The spelling of 1159986 in words is "one million, one hundred fifty-nine thousand, nine hundred eighty-six".