1131320140 has 24 divisors (see below), whose sum is σ = 2439983952. Its totient is φ = 440297280.

The previous prime is 1131320111. The next prime is 1131320143. The reversal of 1131320140 is 410231311.

It is not an unprimeable number, because it can be changed into a prime (1131320143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 763666 + ... + 765145.

It is an arithmetic number, because the mean of its divisors is an integer number (101665998).

Almost surely, 2^1131320140 is an apocalyptic number.

1131320140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131320140 is an abundant number, since it is smaller than the sum of its proper divisors (1308663812).

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

1131320140 is a wasteful number, since it uses less digits than its factorization.

1131320140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1528857 (or 1528855 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1131320140 is about 33635.1027945508. The cubic root of 1131320140 is about 1041.9858936128.

Adding to 1131320140 its reverse (410231311), we get a palindrome (1541551451).

The spelling of 1131320140 in words is "one billion, one hundred thirty-one million, three hundred twenty thousand, one hundred forty".