1331126143 has 4 divisors (see below), whose sum is σ = 1374065728. Its totient is φ = 1288186560.

The previous prime is 1331126107. The next prime is 1331126179. The reversal of 1331126143 is 3416211331.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1331126107) and next prime (1331126179).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331126143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331126443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21469746 + ... + 21469807.

It is an arithmetic number, because the mean of its divisors is an integer number (343516432).

Almost surely, 2^1331126143 is an apocalyptic number.

1331126143 is a deficient number, since it is larger than the sum of its proper divisors (42939585).

1331126143 is an equidigital number, since it uses as much as digits as its factorization.

1331126143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42939584.

The product of its digits is 1296, while the sum is 25.

The square root of 1331126143 is about 36484.6014504750. The cubic root of 1331126143 is about 1100.0347490400.

Adding to 1331126143 its reverse (3416211331), we get a palindrome (4747337474).

The spelling of 1331126143 in words is "one billion, three hundred thirty-one million, one hundred twenty-six thousand, one hundred forty-three".