1115547145 has 4 divisors (see below), whose sum is σ = 1338656580. Its totient is φ = 892437712.

The previous prime is 1115547143. The next prime is 1115547163. The reversal of 1115547145 is 5417455111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5417455111 = 30139 ⋅179749.

It can be written as a sum of positive squares in 2 ways, for example, as 679071481 + 436475664 = 26059^2 + 20892^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115547145 - 2¹ = 1115547143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1115547145.

It is not an unprimeable number, because it can be changed into a prime (1115547143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111554710 + ... + 111554719.

It is an arithmetic number, because the mean of its divisors is an integer number (334664145).

Almost surely, 2^1115547145 is an apocalyptic number.

It is an amenable number.

1115547145 is a deficient number, since it is larger than the sum of its proper divisors (223109435).

1115547145 is an equidigital number, since it uses as much as digits as its factorization.

1115547145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223109434.

The product of its digits is 14000, while the sum is 34.

The square root of 1115547145 is about 33399.8075593258. The cubic root of 1115547145 is about 1037.1207172182.

The spelling of 1115547145 in words is "one billion, one hundred fifteen million, five hundred forty-seven thousand, one hundred forty-five".