1161322071 has 64 divisors (see below), whose sum is σ = 2072706048. Its totient is φ = 560867328.

The previous prime is 1161322051. The next prime is 1161322073. The reversal of 1161322071 is 1702231611.

It is not a de Polignac number, because 1161322071 - 2¹⁸ = 1161059927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161322073) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 168336 + ... + 175098.

It is an arithmetic number, because the mean of its divisors is an integer number (32386032).

Almost surely, 2^1161322071 is an apocalyptic number.

1161322071 is a deficient number, since it is larger than the sum of its proper divisors (911383977).

1161322071 is a wasteful number, since it uses less digits than its factorization.

1161322071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6840.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 1161322071 is about 34078.1758754778. The cubic root of 1161322071 is about 1051.1165962896.

Adding to 1161322071 its reverse (1702231611), we get a palindrome (2863553682).

The spelling of 1161322071 in words is "one billion, one hundred sixty-one million, three hundred twenty-two thousand, seventy-one".