1161521227 has 2 divisors, whose sum is σ = 1161521228. Its totient is φ = 1161521226.

The previous prime is 1161521219. The next prime is 1161521261. The reversal of 1161521227 is 7221251611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161521227 - 2³ = 1161521219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1161521195 and 1161521204.

It is not a weakly prime, because it can be changed into another prime (1161521297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580760613 + 580760614.

It is an arithmetic number, because the mean of its divisors is an integer number (580760614).

Almost surely, 2^1161521227 is an apocalyptic number.

1161521227 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161521227 is an equidigital number, since it uses as much as digits as its factorization.

1161521227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 28.

The square root of 1161521227 is about 34081.0977962858. The cubic root of 1161521227 is about 1051.1766784485.

Adding to 1161521227 its reverse (7221251611), we get a palindrome (8382772838).

The spelling of 1161521227 in words is "one billion, one hundred sixty-one million, five hundred twenty-one thousand, two hundred twenty-seven".