1131443001 has 18 divisors (see below), whose sum is σ = 1769695278. Its totient is φ = 696271680.

The previous prime is 1131442981. The next prime is 1131443021. The reversal of 1131443001 is 1003441311.

It is an interprime number because it is at equal distance from previous prime (1131442981) and next prime (1131443021).

It can be written as a sum of positive squares in 3 ways, for example, as 22553001 + 1108890000 = 4749^2 + 33300^2 .

It is not a de Polignac number, because 1131443001 - 2⁶ = 1131442937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131443021) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 370420 + ... + 373461.

Almost surely, 2^1131443001 is an apocalyptic number.

It is an amenable number.

1131443001 is a deficient number, since it is larger than the sum of its proper divisors (638252277).

1131443001 is a wasteful number, since it uses less digits than its factorization.

1131443001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743913 (or 743897 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1131443001 is about 33636.9291255905. The cubic root of 1131443001 is about 1042.0236120241.

Adding to 1131443001 its reverse (1003441311), we get a palindrome (2134884312).

The spelling of 1131443001 in words is "one billion, one hundred thirty-one million, four hundred forty-three thousand, one".