1131489 has 20 divisors (see below), whose sum is σ = 1725460. Its totient is φ = 738720.

The previous prime is 1131479. The next prime is 1131491. The reversal of 1131489 is 9841311.

It can be written as a sum of positive squares in 2 ways, for example, as 518400 + 613089 = 720^2 + 783^2 .

It is not a de Polignac number, because 1131489 - 2¹¹ = 1129441 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1131419) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4827 + ... + 5055.

It is an arithmetic number, because the mean of its divisors is an integer number (86273).

2^1131489 is an apocalyptic number.

It is an amenable number.

1131489 is a deficient number, since it is larger than the sum of its proper divisors (593971).

1131489 is an equidigital number, since it uses as much as digits as its factorization.

1131489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 293 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 1131489 is about 1063.7147173937. The cubic root of 1131489 is about 104.2037733046.

The spelling of 1131489 in words is "one million, one hundred thirty-one thousand, four hundred eighty-nine".