12013730 has 24 divisors (see below), whose sum is σ = 22977108. Its totient is φ = 4521728.

The previous prime is 12013699. The next prime is 12013733. The reversal of 12013730 is 3731021.

It can be written as a sum of positive squares in 6 ways, for example, as 8369449 + 3644281 = 2893^2 + 1909^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12013699 and 12013708.

It is not an unprimeable number, because it can be changed into a prime (12013733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 812 + ... + 4968.

Almost surely, 2^12013730 is an apocalyptic number.

12013730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12013730 is a deficient number, since it is larger than the sum of its proper divisors (10963378).

12013730 is a wasteful number, since it uses less digits than its factorization.

12013730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198 (or 4181 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 12013730 is about 3466.0828033964. The cubic root of 12013730 is about 229.0301314890.

Adding to 12013730 its reverse (3731021), we get a palindrome (15744751).

The spelling of 12013730 in words is "twelve million, thirteen thousand, seven hundred thirty".