1131512141 has 4 divisors (see below), whose sum is σ = 1131651900. Its totient is φ = 1131372384.

The previous prime is 1131512113. The next prime is 1131512159. The reversal of 1131512141 is 1412151311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1412151311 = 131 ⋅10779781.

It can be written as a sum of positive squares in 2 ways, for example, as 883575625 + 247936516 = 29725^2 + 15746^2 .

It is a cyclic number.

It is not a de Polignac number, because 1131512141 - 2¹⁸ = 1131249997 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 (1131542141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56936 + ... + 74193.

It is an arithmetic number, because the mean of its divisors is an integer number (282912975).

Almost surely, 2^1131512141 is an apocalyptic number.

It is an amenable number.

1131512141 is a deficient number, since it is larger than the sum of its proper divisors (139759).

1131512141 is an equidigital number, since it uses as much as digits as its factorization.

1131512141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139758.

The product of its digits is 120, while the sum is 20.

The square root of 1131512141 is about 33637.9568493688. The cubic root of 1131512141 is about 1042.0448368508.

Adding to 1131512141 its reverse (1412151311), we get a palindrome (2543663452).

The spelling of 1131512141 in words is "one billion, one hundred thirty-one million, five hundred twelve thousand, one hundred forty-one".