1305080945 has 24 divisors (see below), whose sum is σ = 1832025600. Its totient is φ = 889883232.

The previous prime is 1305080941. The next prime is 1305080969. The reversal of 1305080945 is 5490805031.

It is not a de Polignac number, because 1305080945 - 2² = 1305080941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1305080941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28976 + ... + 58734.

It is an arithmetic number, because the mean of its divisors is an integer number (76334400).

Almost surely, 2^1305080945 is an apocalyptic number.

It is an amenable number.

1305080945 is a deficient number, since it is larger than the sum of its proper divisors (526944655).

1305080945 is a wasteful number, since it uses less digits than its factorization.

1305080945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29957 (or 29950 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 1305080945 is about 36125.9040717322. The cubic root of 1305080945 is about 1092.8129082910.

Adding to 1305080945 its reverse (5490805031), we get a palindrome (6795885976).

The spelling of 1305080945 in words is "one billion, three hundred five million, eighty thousand, nine hundred forty-five".