1305089530 has 32 divisors (see below), whose sum is σ = 2417078160. Its totient is φ = 506995200.

The previous prime is 1305089521. The next prime is 1305089551. The reversal of 1305089530 is 359805031.

It can be written as a sum of positive squares in 8 ways, for example, as 793379889 + 511709641 = 28167^2 + 22621^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 219436 + ... + 225304.

Almost surely, 2^1305089530 is an apocalyptic number.

1305089530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1305089530 is a deficient number, since it is larger than the sum of its proper divisors (1111988630).

1305089530 is a wasteful number, since it uses less digits than its factorization.

1305089530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6514.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 1305089530 is about 36126.0228920926. The cubic root of 1305089530 is about 1092.8153045097.

The spelling of 1305089530 in words is "one billion, three hundred five million, eighty-nine thousand, five hundred thirty".