1145505005 has 4 divisors (see below), whose sum is σ = 1374606012. Its totient is φ = 916404000.

The previous prime is 1145504939. The next prime is 1145505013. The reversal of 1145505005 is 5005055411.

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 547653604 + 597851401 = 23402^2 + 24451^2 .

It is not a de Polignac number, because 1145505005 - 2²² = 1141310701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114550496 + ... + 114550505.

It is an arithmetic number, because the mean of its divisors is an integer number (343651503).

Almost surely, 2^1145505005 is an apocalyptic number.

It is an amenable number.

1145505005 is a deficient number, since it is larger than the sum of its proper divisors (229101007).

1145505005 is an equidigital number, since it uses as much as digits as its factorization.

1145505005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229101006.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 1145505005 is about 33845.3099409652. The cubic root of 1145505005 is about 1046.3227391217.

The spelling of 1145505005 in words is "one billion, one hundred forty-five million, five hundred five thousand, five".