1128787145 has 4 divisors (see below), whose sum is σ = 1354544580. Its totient is φ = 903029712.

The previous prime is 1128787111. The next prime is 1128787189. The reversal of 1128787145 is 5417878211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5417878211 = 41 ⋅132143371.

It can be written as a sum of positive squares in 2 ways, for example, as 234059401 + 894727744 = 15299^2 + 29912^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128787145 - 2⁶ = 1128787081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1128787096 and 1128787105.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112878710 + ... + 112878719.

It is an arithmetic number, because the mean of its divisors is an integer number (338636145).

Almost surely, 2^1128787145 is an apocalyptic number.

It is an amenable number.

1128787145 is a deficient number, since it is larger than the sum of its proper divisors (225757435).

1128787145 is an equidigital number, since it uses as much as digits as its factorization.

1128787145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225757434.

The product of its digits is 125440, while the sum is 44.

The square root of 1128787145 is about 33597.4276545095. The cubic root of 1128787145 is about 1041.2076531525.

The spelling of 1128787145 in words is "one billion, one hundred twenty-eight million, seven hundred eighty-seven thousand, one hundred forty-five".