1115521241 has 2 divisors, whose sum is σ = 1115521242. Its totient is φ = 1115521240.

The previous prime is 1115521237. The next prime is 1115521259. The reversal of 1115521241 is 1421255111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1051056400 + 64464841 = 32420^2 + 8029^2 .

It is an emirp because it is prime and its reverse (1421255111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1115521241 - 2² = 1115521237 is a prime.

It is not a weakly prime, because it can be changed into another prime (1115521261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557760620 + 557760621.

It is an arithmetic number, because the mean of its divisors is an integer number (557760621).

Almost surely, 2^1115521241 is an apocalyptic number.

It is an amenable number.

1115521241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115521241 is an equidigital number, since it uses as much as digits as its factorization.

1115521241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400, while the sum is 23.

The square root of 1115521241 is about 33399.4197704092. The cubic root of 1115521241 is about 1037.1126895333.

Adding to 1115521241 its reverse (1421255111), we get a palindrome (2536776352).

The spelling of 1115521241 in words is "one billion, one hundred fifteen million, five hundred twenty-one thousand, two hundred forty-one".