1155641255 has 8 divisors (see below), whose sum is σ = 1388338272. Its totient is φ = 923467168.

The previous prime is 1155641243. The next prime is 1155641269. The reversal of 1155641255 is 5521465511.

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 1155641255 - 2¹⁰ = 1155640231 is a prime.

It is a Duffinian number.

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, 125852 + ... + 134721.

It is an arithmetic number, because the mean of its divisors is an integer number (173542284).

Almost surely, 2^1155641255 is an apocalyptic number.

1155641255 is a deficient number, since it is larger than the sum of its proper divisors (232697017).

1155641255 is an equidigital number, since it uses as much as digits as its factorization.

1155641255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261465.

The product of its digits is 30000, while the sum is 35.

The square root of 1155641255 is about 33994.7239288687. The cubic root of 1155641255 is about 1049.3998853462.

The spelling of 1155641255 in words is "one billion, one hundred fifty-five million, six hundred forty-one thousand, two hundred fifty-five".