1145505203 has 4 divisors (see below), whose sum is σ = 1212887880. Its totient is φ = 1078122528.

The previous prime is 1145505187. The next prime is 1145505217. The reversal of 1145505203 is 3025055411.

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

It is a cyclic number.

It is not a de Polignac number, because 1145505203 - 2⁴ = 1145505187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1145505223) by changing a digit.

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, 33691313 + ... + 33691346.

It is an arithmetic number, because the mean of its divisors is an integer number (303221970).

Almost surely, 2^1145505203 is an apocalyptic number.

1145505203 is a deficient number, since it is larger than the sum of its proper divisors (67382677).

1145505203 is an equidigital number, since it uses as much as digits as its factorization.

1145505203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67382676.

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

The square root of 1145505203 is about 33845.3128660380. The cubic root of 1145505203 is about 1046.3227994072.

The spelling of 1145505203 in words is "one billion, one hundred forty-five million, five hundred five thousand, two hundred three".