1161121173 has 8 divisors (see below), whose sum is σ = 1550431008. Its totient is φ = 772946064.

The previous prime is 1161121147. The next prime is 1161121207. The reversal of 1161121173 is 3711211611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1161121173 - 2¹⁷ = 1160990101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161121133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281290 + ... + 285387.

It is an arithmetic number, because the mean of its divisors is an integer number (193803876).

Almost surely, 2^1161121173 is an apocalyptic number.

It is an amenable number.

1161121173 is a deficient number, since it is larger than the sum of its proper divisors (389309835).

1161121173 is an equidigital number, since it uses as much as digits as its factorization.

1161121173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567363.

The product of its digits is 252, while the sum is 24.

The square root of 1161121173 is about 34075.2281430367. The cubic root of 1161121173 is about 1051.0559816376.

Adding to 1161121173 its reverse (3711211611), we get a palindrome (4872332784).

The spelling of 1161121173 in words is "one billion, one hundred sixty-one million, one hundred twenty-one thousand, one hundred seventy-three".