1131380 has 12 divisors (see below), whose sum is σ = 2375940. Its totient is φ = 452544.

The previous prime is 1131379. The next prime is 1131397. The reversal of 1131380 is 831311.

It can be written as a sum of positive squares in 2 ways, for example, as 824464 + 306916 = 908^2 + 554^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28265 + ... + 28304.

It is an arithmetic number, because the mean of its divisors is an integer number (197995).

2^1131380 is an apocalyptic number.

1131380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131380 is an abundant number, since it is smaller than the sum of its proper divisors (1244560).

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

1131380 is a wasteful number, since it uses less digits than its factorization.

1131380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56578 (or 56576 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1131380 is about 1063.6634806178. The cubic root of 1131380 is about 104.2004271015.

Adding to 1131380 its reverse (831311), we get a palindrome (1962691).

The spelling of 1131380 in words is "one million, one hundred thirty-one thousand, three hundred eighty".