1155260591 has 8 divisors (see below), whose sum is σ = 1228602480. Its totient is φ = 1083172608.

The previous prime is 1155260563. The next prime is 1155260593. The reversal of 1155260591 is 1950625511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1155260591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1155260593) 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 7 ways as a sum of consecutive naturals, for example, 311576 + ... + 315261.

It is an arithmetic number, because the mean of its divisors is an integer number (153575310).

Almost surely, 2^1155260591 is an apocalyptic number.

1155260591 is a deficient number, since it is larger than the sum of its proper divisors (73341889).

1155260591 is an equidigital number, since it uses as much as digits as its factorization.

1155260591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626953.

The product of its (nonzero) digits is 13500, while the sum is 35.

The square root of 1155260591 is about 33989.1245989066. The cubic root of 1155260591 is about 1049.2846498654.

The spelling of 1155260591 in words is "one billion, one hundred fifty-five million, two hundred sixty thousand, five hundred ninety-one".