1161984 has 72 divisors (see below), whose sum is σ = 3311280. Its totient is φ = 360448.

The previous prime is 1161949. The next prime is 1161991. The reversal of 1161984 is 4891611.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 14.

It is a zygodrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13012 + ... + 13100.

It is an arithmetic number, because the mean of its divisors is an integer number (45990).

2^1161984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1655640).

1161984 is an abundant number, since it is smaller than the sum of its proper divisors (2149296).

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

1161984 is an equidigital number, since it uses as much as digits as its factorization.

1161984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125 (or 111 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 1161984 is about 1077.9536168129. The cubic root of 1161984 is about 105.1316263096.

It can be divided in two parts, 1161 and 984, that added together give a triangular number (2145 = T₆₅).

The spelling of 1161984 in words is "one million, one hundred sixty-one thousand, nine hundred eighty-four".