1151605065 has 16 divisors (see below), whose sum is σ = 1984304448. Its totient is φ = 566943936.

The previous prime is 1151605043. The next prime is 1151605069. The reversal of 1151605065 is 5605061511.

It is not a de Polignac number, because 1151605065 - 2⁶ = 1151605001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1151605069) 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 15 ways as a sum of consecutive naturals, for example, 2952639 + ... + 2953028.

It is an arithmetic number, because the mean of its divisors is an integer number (124019028).

Almost surely, 2^1151605065 is an apocalyptic number.

1151605065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1151605065 is a deficient number, since it is larger than the sum of its proper divisors (832699383).

1151605065 is a wasteful number, since it uses less digits than its factorization.

1151605065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5905688.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 1151605065 is about 33935.3070562210. The cubic root of 1151605065 is about 1048.1767497203.

Adding to 1151605065 its reverse (5605061511), we get a palindrome (6756666576).

The spelling of 1151605065 in words is "one billion, one hundred fifty-one million, six hundred five thousand, sixty-five".