1151521365 has 16 divisors (see below), whose sum is σ = 1845369216. Its totient is φ = 613166400.

The previous prime is 1151521331. The next prime is 1151521369. The reversal of 1151521365 is 5631251511.

It is not a de Polignac number, because 1151521365 - 2⁸ = 1151521109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151521369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51366 + ... + 70295.

It is an arithmetic number, because the mean of its divisors is an integer number (115335576).

Almost surely, 2^1151521365 is an apocalyptic number.

1151521365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1151521365 is a deficient number, since it is larger than the sum of its proper divisors (693847851).

1151521365 is a wasteful number, since it uses less digits than its factorization.

1151521365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122300.

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

The square root of 1151521365 is about 33934.0738049530. The cubic root of 1151521365 is about 1048.1513548686.

Adding to 1151521365 its reverse (5631251511), we get a palindrome (6782772876).

The spelling of 1151521365 in words is "one billion, one hundred fifty-one million, five hundred twenty-one thousand, three hundred sixty-five".