1530021705 has 32 divisors (see below), whose sum is σ = 2486550528. Its totient is φ = 803275200.

The previous prime is 1530021679. The next prime is 1530021707. The reversal of 1530021705 is 5071200351.

It is not a de Polignac number, because 1530021705 - 2⁹ = 1530021193 is a prime.

It is a super-2 number, since 2×1530021705² = 4681932835542214050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1530021707) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 246490 + ... + 252620.

It is an arithmetic number, because the mean of its divisors is an integer number (77704704).

Almost surely, 2^1530021705 is an apocalyptic number.

1530021705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1530021705 is a deficient number, since it is larger than the sum of its proper divisors (956528823).

1530021705 is a wasteful number, since it uses less digits than its factorization.

1530021705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6397.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 1530021705 is about 39115.4918798166. The cubic root of 1530021705 is about 1152.3008014114.

The spelling of 1530021705 in words is "one billion, five hundred thirty million, twenty-one thousand, seven hundred five".