1305500003 has 4 divisors (see below), whose sum is σ = 1306094808. Its totient is φ = 1304905200.

The previous prime is 1305499999. The next prime is 1305500029. The reversal of 1305500003 is 3000055031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3000055031 = 1049 ⋅2859919.

It is a cyclic number.

It is not a de Polignac number, because 1305500003 - 2² = 1305499999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1305500083) 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, 294098 + ... + 298503.

It is an arithmetic number, because the mean of its divisors is an integer number (326523702).

Almost surely, 2^1305500003 is an apocalyptic number.

1305500003 is a deficient number, since it is larger than the sum of its proper divisors (594805).

1305500003 is an equidigital number, since it uses as much as digits as its factorization.

1305500003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594804.

The product of its (nonzero) digits is 225, while the sum is 17.

The square root of 1305500003 is about 36131.7035717941. The cubic root of 1305500003 is about 1092.9298622078.

Adding to 1305500003 its reverse (3000055031), we get a palindrome (4305555034).

The spelling of 1305500003 in words is "one billion, three hundred five million, five hundred thousand, three".