1131286841 has 4 divisors (see below), whose sum is σ = 1131360384. Its totient is φ = 1131213300.

The previous prime is 1131286837. The next prime is 1131286853. The reversal of 1131286841 is 1486821311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1131286841 - 2² = 1131286837 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131286831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3905 + ... + 47726.

It is an arithmetic number, because the mean of its divisors is an integer number (282840096).

Almost surely, 2^1131286841 is an apocalyptic number.

It is an amenable number.

1131286841 is a deficient number, since it is larger than the sum of its proper divisors (73543).

1131286841 is an equidigital number, since it uses as much as digits as its factorization.

1131286841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73542.

The product of its digits is 9216, while the sum is 35.

The square root of 1131286841 is about 33634.6077872182. The cubic root of 1131286841 is about 1041.9756703266.

The spelling of 1131286841 in words is "one billion, one hundred thirty-one million, two hundred eighty-six thousand, eight hundred forty-one".