1303020305 has 16 divisors (see below), whose sum is σ = 1612949520. Its totient is φ = 1009780992.

The previous prime is 1303020293. The next prime is 1303020307. The reversal of 1303020305 is 5030203031.

It can be written as a sum of positive squares in 8 ways, for example, as 173791489 + 1129228816 = 13183^2 + 33604^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303020305 - 2¹⁴ = 1303003921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1303020307) 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 15 ways as a sum of consecutive naturals, for example, 26987 + ... + 57743.

It is an arithmetic number, because the mean of its divisors is an integer number (100809345).

Almost surely, 2^1303020305 is an apocalyptic number.

It is an amenable number.

1303020305 is a deficient number, since it is larger than the sum of its proper divisors (309929215).

1303020305 is a wasteful number, since it uses less digits than its factorization.

1303020305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31028.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 1303020305 is about 36097.3725498131. The cubic root of 1303020305 is about 1092.2374445646.

Adding to 1303020305 its reverse (5030203031), we get a palindrome (6333223336).

The spelling of 1303020305 in words is "one billion, three hundred three million, twenty thousand, three hundred five".