1155440241 has 32 divisors (see below), whose sum is σ = 1821985920. Its totient is φ = 721170432.

The previous prime is 1155440219. The next prime is 1155440269. The reversal of 1155440241 is 1420445511.

1155440241 is a `hidden beast` number, since 115 + 544 + 0 + 2 + 4 + 1 = 666.

It is not a de Polignac number, because 1155440241 - 2⁶ = 1155440177 is a prime.

It is a super-3 number, since 3×1155440241³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1155440281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 82066 + ... + 95108.

It is an arithmetic number, because the mean of its divisors is an integer number (56937060).

Almost surely, 2^1155440241 is an apocalyptic number.

It is an amenable number.

1155440241 is a deficient number, since it is larger than the sum of its proper divisors (666545679).

1155440241 is a wasteful number, since it uses less digits than its factorization.

1155440241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13262 (or 13256 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 1155440241 is about 33991.7672532630. The cubic root of 1155440241 is about 1049.3390370800.

Adding to 1155440241 its reverse (1420445511), we get a palindrome (2575885752).

The spelling of 1155440241 in words is "one billion, one hundred fifty-five million, four hundred forty thousand, two hundred forty-one".