1115721441 has 48 divisors (see below), whose sum is σ = 1745767296. Its totient is φ = 684108288.

The previous prime is 1115721419. The next prime is 1115721457. The reversal of 1115721441 is 1441275111.

It is not a de Polignac number, because 1115721441 - 2⁶ = 1115721377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1115721641) 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 47 ways as a sum of consecutive naturals, for example, 1307571 + ... + 1308423.

It is an arithmetic number, because the mean of its divisors is an integer number (36370152).

Almost surely, 2^1115721441 is an apocalyptic number.

It is an amenable number.

1115721441 is a deficient number, since it is larger than the sum of its proper divisors (630045855).

1115721441 is a wasteful number, since it uses less digits than its factorization.

1115721441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062 (or 1059 counting only the distinct ones).

The product of its digits is 1120, while the sum is 27.

The square root of 1115721441 is about 33402.4166940058. The cubic root of 1115721441 is about 1037.1747285554.

Adding to 1115721441 its reverse (1441275111), we get a palindrome (2556996552).

The spelling of 1115721441 in words is "one billion, one hundred fifteen million, seven hundred twenty-one thousand, four hundred forty-one".