1165243255 has 16 divisors (see below), whose sum is σ = 1536393600. Its totient is φ = 841347360.

The previous prime is 1165243243. The next prime is 1165243271. The reversal of 1165243255 is 5523425611.

It is a de Polignac number, because none of the positive numbers 2^k-1165243255 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1165243255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68565 + ... + 83854.

It is an arithmetic number, because the mean of its divisors is an integer number (96024600).

Almost surely, 2^1165243255 is an apocalyptic number.

1165243255 is a deficient number, since it is larger than the sum of its proper divisors (371150345).

1165243255 is a wasteful number, since it uses less digits than its factorization.

1165243255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152574.

The product of its digits is 36000, while the sum is 34.

The square root of 1165243255 is about 34135.6595805618. The cubic root of 1165243255 is about 1052.2982929963.

Adding to 1165243255 its reverse (5523425611), we get a palindrome (6688668866).

The spelling of 1165243255 in words is "one billion, one hundred sixty-five million, two hundred forty-three thousand, two hundred fifty-five".