1131502140 has 72 divisors (see below), whose sum is σ = 3454170720. Its totient is φ = 299804544.

The previous prime is 1131502121. The next prime is 1131502147. The reversal of 1131502140 is 412051311.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131502147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8241 + ... + 48279.

Almost surely, 2^1131502140 is an apocalyptic number.

1131502140 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 1131502140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1727085360).

1131502140 is an abundant number, since it is smaller than the sum of its proper divisors (2322668580).

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

1131502140 is a wasteful number, since it uses less digits than its factorization.

1131502140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40211 (or 40206 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1131502140 is about 33637.8081925681. The cubic root of 1131502140 is about 1042.0417667642.

Adding to 1131502140 its reverse (412051311), we get a palindrome (1543553451).

The spelling of 1131502140 in words is "one billion, one hundred thirty-one million, five hundred two thousand, one hundred forty".