1131588 has 54 divisors (see below), whose sum is σ = 3100734. Its totient is φ = 346752.

The previous prime is 1131569. The next prime is 1131617. The reversal of 1131588 is 8851311.

It can be written as a sum of positive squares in only one way, i.e., 1065024 + 66564 = 1032^2 + 258^2 .

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 26295 + ... + 26337.

It is an arithmetic number, because the mean of its divisors is an integer number (57421).

2^1131588 is an apocalyptic number.

1131588 is a gapful number since it is divisible by the number (18) 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 1131588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550367).

1131588 is an abundant number, since it is smaller than the sum of its proper divisors (1969146).

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

1131588 is a wasteful number, since it uses less digits than its factorization.

1131588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 65 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 1131588 is about 1063.7612514094. The cubic root of 1131588 is about 104.2068123304.

Adding to 1131588 its reverse (8851311), we get a palindrome (9982899).

The spelling of 1131588 in words is "one million, one hundred thirty-one thousand, five hundred eighty-eight".