1131443756 has 6 divisors (see below), whose sum is σ = 1980026580. Its totient is φ = 565721876.

The previous prime is 1131443743. The next prime is 1131443759. The reversal of 1131443756 is 6573441311.

It is not an unprimeable number, because it can be changed into a prime (1131443759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141430466 + ... + 141430473.

It is an arithmetic number, because the mean of its divisors is an integer number (330004430).

Almost surely, 2^1131443756 is an apocalyptic number.

It is an amenable number.

1131443756 is a deficient number, since it is larger than the sum of its proper divisors (848582824).

1131443756 is a wasteful number, since it uses less digits than its factorization.

1131443756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282860943 (or 282860941 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 1131443756 is about 33636.9403483729. The cubic root of 1131443756 is about 1042.0238438012.

The spelling of 1131443756 in words is "one billion, one hundred thirty-one million, four hundred forty-three thousand, seven hundred fifty-six".