1155140241 has 4 divisors (see below), whose sum is σ = 1540186992. Its totient is φ = 770093492.

The previous prime is 1155140237. The next prime is 1155140243. The reversal of 1155140241 is 1420415511.

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 an emirpimes, since its reverse is a distinct semiprime: 1420415511 = 3 ⋅473471837.

It is a cyclic number.

It is not a de Polignac number, because 1155140241 - 2² = 1155140237 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155140243) 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, 192523371 + ... + 192523376.

It is an arithmetic number, because the mean of its divisors is an integer number (385046748).

Almost surely, 2^1155140241 is an apocalyptic number.

It is an amenable number.

1155140241 is a deficient number, since it is larger than the sum of its proper divisors (385046751).

1155140241 is an equidigital number, since it uses as much as digits as its factorization.

1155140241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385046750.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1155140241 is about 33987.3541335597. The cubic root of 1155140241 is about 1049.2482119702.

Adding to 1155140241 its reverse (1420415511), we get a palindrome (2575555752).

The spelling of 1155140241 in words is "one billion, one hundred fifty-five million, one hundred forty thousand, two hundred forty-one".