1155248587 has 4 divisors (see below), whose sum is σ = 1158739096. Its totient is φ = 1151758080.

The previous prime is 1155248581. The next prime is 1155248629. The reversal of 1155248587 is 7858425511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1155248587 - 2⁷ = 1155248459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155248581) 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 3 ways as a sum of consecutive naturals, for example, 1744758 + ... + 1745419.

It is an arithmetic number, because the mean of its divisors is an integer number (289684774).

Almost surely, 2^1155248587 is an apocalyptic number.

1155248587 is a deficient number, since it is larger than the sum of its proper divisors (3490509).

1155248587 is an equidigital number, since it uses as much as digits as its factorization.

1155248587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490508.

The product of its digits is 448000, while the sum is 46.

The square root of 1155248587 is about 33988.9480125526. The cubic root of 1155248587 is about 1049.2810155752.

It can be divided in two parts, 11552485 and 87, that multiplied together give a triangular number (1005066195 = T₄₄₈₃₄).

The spelling of 1155248587 in words is "one billion, one hundred fifty-five million, two hundred forty-eight thousand, five hundred eighty-seven".