1155145305 has 8 divisors (see below), whose sum is σ = 1848232512. Its totient is φ = 616077488.

The previous prime is 1155145283. The next prime is 1155145331. The reversal of 1155145305 is 5035415511.

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 1155145305 - 2¹⁶ = 1155079769 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38504829 + ... + 38504858.

It is an arithmetic number, because the mean of its divisors is an integer number (231029064).

Almost surely, 2^1155145305 is an apocalyptic number.

1155145305 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1155145305 is a deficient number, since it is larger than the sum of its proper divisors (693087207).

1155145305 is an equidigital number, since it uses as much as digits as its factorization.

1155145305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77009695.

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 1155145305 is about 33987.4286317750. The cubic root of 1155145305 is about 1049.2497452285.

The spelling of 1155145305 in words is "one billion, one hundred fifty-five million, one hundred forty-five thousand, three hundred five".