1300005730 has 32 divisors (see below), whose sum is σ = 2448635184. Its totient is φ = 496394496.

The previous prime is 1300005719. The next prime is 1300005743. The reversal of 1300005730 is 375000031.

It can be written as a sum of positive squares in 8 ways, for example, as 782488729 + 517517001 = 27973^2 + 22749^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1300005698 and 1300005707.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13537 + ... + 52756.

Almost surely, 2^1300005730 is an apocalyptic number.

1300005730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1300005730 is a deficient number, since it is larger than the sum of its proper divisors (1148629454).

1300005730 is a wasteful number, since it uses less digits than its factorization.

1300005730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66390.

The product of its (nonzero) digits is 315, while the sum is 19.

The square root of 1300005730 is about 36055.5922153554. The cubic root of 1300005730 is about 1091.3944865668.

Adding to 1300005730 its reverse (375000031), we get a palindrome (1675005761).

The spelling of 1300005730 in words is "one billion, three hundred million, five thousand, seven hundred thirty".