1200001730 has 32 divisors (see below), whose sum is σ = 2236950000. Its totient is φ = 462938112.

The previous prime is 1200001721. The next prime is 1200001739. The reversal of 1200001730 is 371000021.

It is an interprime number because it is at equal distance from previous prime (1200001721) and next prime (1200001739).

It can be written as a sum of positive squares in 8 ways, for example, as 776012449 + 423989281 = 27857^2 + 20591^2 .

It is a super-3 number, since 3×1200001730³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1200001739) 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, 360554 + ... + 363866.

Almost surely, 2^1200001730 is an apocalyptic number.

1200001730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200001730 is a deficient number, since it is larger than the sum of its proper divisors (1036948270).

1200001730 is a wasteful number, since it uses less digits than its factorization.

1200001730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4598.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 1200001730 is about 34641.0411217677. The cubic root of 1200001730 is about 1062.6590798488.

Adding to 1200001730 its reverse (371000021), we get a palindrome (1571001751).

The spelling of 1200001730 in words is "one billion, two hundred million, one thousand, seven hundred thirty".