1161244265 has 8 divisors (see below), whose sum is σ = 1393891848. Its totient is φ = 928729600.

The previous prime is 1161244241. The next prime is 1161244289. The reversal of 1161244265 is 5624421611.

It is an interprime number because it is at equal distance from previous prime (1161244241) and next prime (1161244289).

It can be written as a sum of positive squares in 4 ways, for example, as 94633984 + 1066610281 = 9728^2 + 32659^2 .

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

It is not a de Polignac number, because 1161244265 - 2²² = 1157049961 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12872 + ... + 49881.

It is an arithmetic number, because the mean of its divisors is an integer number (174236481).

Almost surely, 2^1161244265 is an apocalyptic number.

It is an amenable number.

1161244265 is a deficient number, since it is larger than the sum of its proper divisors (232647583).

1161244265 is an equidigital number, since it uses as much as digits as its factorization.

1161244265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66459.

The product of its digits is 11520, while the sum is 32.

The square root of 1161244265 is about 34077.0342753004. The cubic root of 1161244265 is about 1051.0931216061.

Adding to 1161244265 its reverse (5624421611), we get a palindrome (6785665876).

The spelling of 1161244265 in words is "one billion, one hundred sixty-one million, two hundred forty-four thousand, two hundred sixty-five".