1161255255 has 8 divisors (see below), whose sum is σ = 1858008432. Its totient is φ = 619336128.

The previous prime is 1161255247. The next prime is 1161255299. The reversal of 1161255255 is 5525521611.

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

It is not a de Polignac number, because 1161255255 - 2³ = 1161255247 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 38708494 + ... + 38708523.

It is an arithmetic number, because the mean of its divisors is an integer number (232251054).

Almost surely, 2^1161255255 is an apocalyptic number.

1161255255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1161255255 is a deficient number, since it is larger than the sum of its proper divisors (696753177).

1161255255 is an equidigital number, since it uses as much as digits as its factorization.

1161255255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77417025.

The product of its digits is 15000, while the sum is 33.

The square root of 1161255255 is about 34077.1955272144. The cubic root of 1161255255 is about 1051.0964374393.

Adding to 1161255255 its reverse (5525521611), we get a palindrome (6686776866).

The spelling of 1161255255 in words is "one billion, one hundred sixty-one million, two hundred fifty-five thousand, two hundred fifty-five".