1155148591 has 2 divisors, whose sum is σ = 1155148592. Its totient is φ = 1155148590.

The previous prime is 1155148559. The next prime is 1155148609. The reversal of 1155148591 is 1958415511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155148591 - 2⁵ = 1155148559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1155142591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577574295 + 577574296.

It is an arithmetic number, because the mean of its divisors is an integer number (577574296).

Almost surely, 2^1155148591 is an apocalyptic number.

1155148591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155148591 is an equidigital number, since it uses as much as digits as its factorization.

1155148591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 40.

The square root of 1155148591 is about 33987.4769731441. The cubic root of 1155148591 is about 1049.2507401485.

The spelling of 1155148591 in words is "one billion, one hundred fifty-five million, one hundred forty-eight thousand, five hundred ninety-one".