1131245144 has 32 divisors (see below), whose sum is σ = 2288243520. Its totient is φ = 522302976.

The previous prime is 1131245081. The next prime is 1131245153. The reversal of 1131245144 is 4415421311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71264 + ... + 85679.

It is an arithmetic number, because the mean of its divisors is an integer number (71507610).

Almost surely, 2^1131245144 is an apocalyptic number.

It is an amenable number.

1131245144 is an abundant number, since it is smaller than the sum of its proper divisors (1156998376).

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

1131245144 is a wasteful number, since it uses less digits than its factorization.

1131245144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157019 (or 157015 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 1131245144 is about 33633.9879288793. The cubic root of 1131245144 is about 1041.9628684472.

Adding to 1131245144 its reverse (4415421311), we get a palindrome (5546666455).

The spelling of 1131245144 in words is "one billion, one hundred thirty-one million, two hundred forty-five thousand, one hundred forty-four".