1155385145 has 8 divisors (see below), whose sum is σ = 1386645000. Its totient is φ = 924186240.

The previous prime is 1155385129. The next prime is 1155385163. The reversal of 1155385145 is 5415835511.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 232501504 + 922883641 = 15248^2 + 30379^2 .

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

It is not a de Polignac number, because 1155385145 - 2⁴ = 1155385129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1155385099 and 1155385108.

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, 62981 + ... + 79229.

It is an arithmetic number, because the mean of its divisors is an integer number (173330625).

Almost surely, 2^1155385145 is an apocalyptic number.

It is an amenable number.

1155385145 is a deficient number, since it is larger than the sum of its proper divisors (231259855).

1155385145 is a wasteful number, since it uses less digits than its factorization.

1155385145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30475.

The product of its digits is 60000, while the sum is 38.

The square root of 1155385145 is about 33990.9568120699. The cubic root of 1155385145 is about 1049.3223579244.

The spelling of 1155385145 in words is "one billion, one hundred fifty-five million, three hundred eighty-five thousand, one hundred forty-five".