1161800 has 48 divisors (see below), whose sum is σ = 2791860. Its totient is φ = 449280.

The previous prime is 1161791. The next prime is 1161829. The reversal of 1161800 is 81611.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 556516 + 605284 = 746^2 + 778^2 .

It is an Ulam number.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7322 + ... + 7478.

2^1161800 is an apocalyptic number.

1161800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1395930).

1161800 is an abundant number, since it is smaller than the sum of its proper divisors (1630060).

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

1161800 is a wasteful number, since it uses less digits than its factorization.

1161800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 1161800 is about 1077.8682665335. The cubic root of 1161800 is about 105.1260768241.

The spelling of 1161800 in words is "one million, one hundred sixty-one thousand, eight hundred".