1155255405 has 8 divisors (see below), whose sum is σ = 1848408672. Its totient is φ = 616136208.

The previous prime is 1155255391. The next prime is 1155255419. The reversal of 1155255405 is 5045525511.

It is an interprime number because it is at equal distance from previous prime (1155255391) and next prime (1155255419).

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

It is not a de Polignac number, because 1155255405 - 2⁴ = 1155255389 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, 38508499 + ... + 38508528.

It is an arithmetic number, because the mean of its divisors is an integer number (231051084).

Almost surely, 2^1155255405 is an apocalyptic number.

1155255405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155255405 is a deficient number, since it is larger than the sum of its proper divisors (693153267).

1155255405 is an equidigital number, since it uses as much as digits as its factorization.

1155255405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77017035.

The product of its (nonzero) digits is 25000, while the sum is 33.

The square root of 1155255405 is about 33989.0483097129. The cubic root of 1155255405 is about 1049.2830797728.

The spelling of 1155255405 in words is "one billion, one hundred fifty-five million, two hundred fifty-five thousand, four hundred five".