1161545227 has 2 divisors, whose sum is σ = 1161545228. Its totient is φ = 1161545226.

The previous prime is 1161545171. The next prime is 1161545269. The reversal of 1161545227 is 7225451611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1161545227 - 2¹¹ = 1161543179 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1161545192 and 1161545201.

It is not a weakly prime, because it can be changed into another prime (1161845227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580772613 + 580772614.

It is an arithmetic number, because the mean of its divisors is an integer number (580772614).

Almost surely, 2^1161545227 is an apocalyptic number.

1161545227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161545227 is an equidigital number, since it uses as much as digits as its factorization.

1161545227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 34.

The square root of 1161545227 is about 34081.4498958011. The cubic root of 1161545227 is about 1051.1839183984.

Adding to 1161545227 its reverse (7225451611), we get a palindrome (8386996838).

The spelling of 1161545227 in words is "one billion, one hundred sixty-one million, five hundred forty-five thousand, two hundred twenty-seven".