1161331027 has 16 divisors (see below), whose sum is σ = 1213125984. Its totient is φ = 1110880000.

The previous prime is 1161331001. The next prime is 1161331049. The reversal of 1161331027 is 7201331611.

It is a cyclic number.

It is not a de Polignac number, because 1161331027 - 2²⁷ = 1027113299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1161330992 and 1161331010.

It is not an unprimeable number, because it can be changed into a prime (1161331097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441777 + ... + 444397.

It is an arithmetic number, because the mean of its divisors is an integer number (75820374).

Almost surely, 2^1161331027 is an apocalyptic number.

1161331027 is a deficient number, since it is larger than the sum of its proper divisors (51794957).

1161331027 is a wasteful number, since it uses less digits than its factorization.

1161331027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870.

The product of its (nonzero) digits is 756, while the sum is 25.

The square root of 1161331027 is about 34078.3072789715. The cubic root of 1161331027 is about 1051.1192983181.

Adding to 1161331027 its reverse (7201331611), we get a palindrome (8362662638).

The spelling of 1161331027 in words is "one billion, one hundred sixty-one million, three hundred thirty-one thousand, twenty-seven".