1131240140 has 12 divisors (see below), whose sum is σ = 2375604336. Its totient is φ = 452496048.

The previous prime is 1131240139. The next prime is 1131240167. The reversal of 1131240140 is 410421311.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28280984 + ... + 28281023.

It is an arithmetic number, because the mean of its divisors is an integer number (197967028).

Almost surely, 2^1131240140 is an apocalyptic number.

1131240140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131240140 is an abundant number, since it is smaller than the sum of its proper divisors (1244364196).

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

1131240140 is a wasteful number, since it uses less digits than its factorization.

1131240140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56562016 (or 56562014 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1131240140 is about 33633.9135397592. The cubic root of 1131240140 is about 1041.9613320900.

Adding to 1131240140 its reverse (410421311), we get a palindrome (1541661451).

The spelling of 1131240140 in words is "one billion, one hundred thirty-one million, two hundred forty thousand, one hundred forty".