1155541547 has 2 divisors, whose sum is σ = 1155541548. Its totient is φ = 1155541546.

The previous prime is 1155541489. The next prime is 1155541559. The reversal of 1155541547 is 7451455511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1155541547 - 2⁸ = 1155541291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1155541547.

It is not a weakly prime, because it can be changed into another prime (1155541567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577770773 + 577770774.

It is an arithmetic number, because the mean of its divisors is an integer number (577770774).

Almost surely, 2^1155541547 is an apocalyptic number.

1155541547 is a deficient number, since it is larger than the sum of its proper divisors (1).

1155541547 is an equidigital number, since it uses as much as digits as its factorization.

1155541547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70000, while the sum is 38.

The square root of 1155541547 is about 33993.2573755443. The cubic root of 1155541547 is about 1049.3697039577.

The spelling of 1155541547 in words is "one billion, one hundred fifty-five million, five hundred forty-one thousand, five hundred forty-seven".