1161064273 has 4 divisors (see below), whose sum is σ = 1163550960. Its totient is φ = 1158577588.

The previous prime is 1161064243. The next prime is 1161064279. The reversal of 1161064273 is 3724601611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1161064273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161064279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1242643 + ... + 1243576.

It is an arithmetic number, because the mean of its divisors is an integer number (290887740).

Almost surely, 2^1161064273 is an apocalyptic number.

It is an amenable number.

1161064273 is a deficient number, since it is larger than the sum of its proper divisors (2486687).

1161064273 is an equidigital number, since it uses as much as digits as its factorization.

1161064273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486686.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1161064273 is about 34074.3932154338. The cubic root of 1161064273 is about 1051.0388125819.

Adding to 1161064273 its reverse (3724601611), we get a palindrome (4885665884).

The spelling of 1161064273 in words is "one billion, one hundred sixty-one million, sixty-four thousand, two hundred seventy-three".