1165511145 has 8 divisors (see below), whose sum is σ = 1864817856. Its totient is φ = 621605936.

The previous prime is 1165511117. The next prime is 1165511147. The reversal of 1165511145 is 5411155611.

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

It is a cyclic number.

It is not a de Polignac number, because 1165511145 - 2¹¹ = 1165509097 is a prime.

It is a super-2 number, since 2×1165511145² = 2716832458238422050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1165511147) 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, 38850357 + ... + 38850386.

It is an arithmetic number, because the mean of its divisors is an integer number (233102232).

Almost surely, 2^1165511145 is an apocalyptic number.

1165511145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1165511145 is a deficient number, since it is larger than the sum of its proper divisors (699306711).

1165511145 is an equidigital number, since it uses as much as digits as its factorization.

1165511145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77700751.

The product of its digits is 3000, while the sum is 30.

The square root of 1165511145 is about 34139.5832575619. The cubic root of 1165511145 is about 1052.3789281164.

Adding to 1165511145 its reverse (5411155611), we get a palindrome (6576666756).

The spelling of 1165511145 in words is "one billion, one hundred sixty-five million, five hundred eleven thousand, one hundred forty-five".