1125504305 has 4 divisors (see below), whose sum is σ = 1350605172. Its totient is φ = 900403440.

The previous prime is 1125504299. The next prime is 1125504313. The reversal of 1125504305 is 5034055211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 180741136 + 944763169 = 13444^2 + 30737^2 .

It is not a de Polignac number, because 1125504305 - 2⁸ = 1125504049 is a prime.

It is a Duffinian number.

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, 112550426 + ... + 112550435.

It is an arithmetic number, because the mean of its divisors is an integer number (337651293).

Almost surely, 2^1125504305 is an apocalyptic number.

It is an amenable number.

1125504305 is a deficient number, since it is larger than the sum of its proper divisors (225100867).

1125504305 is an equidigital number, since it uses as much as digits as its factorization.

1125504305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225100866.

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 1125504305 is about 33548.5365552657. The cubic root of 1125504305 is about 1040.1972952247.

Adding to 1125504305 its reverse (5034055211), we get a palindrome (6159559516).

The spelling of 1125504305 in words is "one billion, one hundred twenty-five million, five hundred four thousand, three hundred five".