1141042561 has 4 divisors (see below), whose sum is σ = 1142738692. Its totient is φ = 1139346432.

The previous prime is 1141042531. The next prime is 1141042579. The reversal of 1141042561 is 1652401411.

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

It can be written as a sum of positive squares in 2 ways, for example, as 413715600 + 727326961 = 20340^2 + 26969^2 .

It is a cyclic number.

It is not a de Polignac number, because 1141042561 - 2¹⁷ = 1140911489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1141042531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 847056 + ... + 848401.

It is an arithmetic number, because the mean of its divisors is an integer number (285684673).

Almost surely, 2^1141042561 is an apocalyptic number.

It is an amenable number.

1141042561 is a deficient number, since it is larger than the sum of its proper divisors (1696131).

1141042561 is an equidigital number, since it uses as much as digits as its factorization.

1141042561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1696130.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1141042561 is about 33779.3214999946. The cubic root of 1141042561 is about 1044.9622815534.

Adding to 1141042561 its reverse (1652401411), we get a palindrome (2793443972).

The spelling of 1141042561 in words is "one billion, one hundred forty-one million, forty-two thousand, five hundred sixty-one".