1145320161 has 8 divisors (see below), whose sum is σ = 1527346464. Its totient is φ = 763420320.

The previous prime is 1145320157. The next prime is 1145320193. The reversal of 1145320161 is 1610235411.

It is a happy number.

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

It is not a de Polignac number, because 1145320161 - 2² = 1145320157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1145320151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7951 + ... + 48516.

It is an arithmetic number, because the mean of its divisors is an integer number (190918308).

Almost surely, 2^1145320161 is an apocalyptic number.

It is an amenable number.

1145320161 is a deficient number, since it is larger than the sum of its proper divisors (382026303).

1145320161 is an equidigital number, since it uses as much as digits as its factorization.

1145320161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63231.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 1145320161 is about 33842.5791127095. The cubic root of 1145320161 is about 1046.2664562644.

Adding to 1145320161 its reverse (1610235411), we get a palindrome (2755555572).

The spelling of 1145320161 in words is "one billion, one hundred forty-five million, three hundred twenty thousand, one hundred sixty-one".