1131880 has 16 divisors (see below), whose sum is σ = 2546820. Its totient is φ = 452736.

The previous prime is 1131869. The next prime is 1131881. The reversal of 1131880 is 881311.

It can be written as a sum of positive squares in 2 ways, for example, as 1028196 + 103684 = 1014^2 + 322^2 .

It is an Ulam number.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1131881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14109 + ... + 14188.

2^1131880 is an apocalyptic number.

1131880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131880 is an abundant number, since it is smaller than the sum of its proper divisors (1414940).

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

1131880 is a wasteful number, since it uses less digits than its factorization.

1131880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28308 (or 28304 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 22.

The square root of 1131880 is about 1063.8984913985. The cubic root of 1131880 is about 104.2157748893.

The spelling of 1131880 in words is "one million, one hundred thirty-one thousand, eight hundred eighty".