12643730 has 32 divisors (see below), whose sum is σ = 25038720. Its totient is φ = 4558720.

The previous prime is 12643723. The next prime is 12643781. The reversal of 12643730 is 3734621.

It is a self number, because there is not a number n which added to its sum of digits gives 12643730.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14651 + ... + 15489.

It is an arithmetic number, because the mean of its divisors is an integer number (782460).

Almost surely, 2^12643730 is an apocalyptic number.

12643730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12643730 is a deficient number, since it is larger than the sum of its proper divisors (12394990).

12643730 is a wasteful number, since it uses less digits than its factorization.

12643730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 12643730 is about 3555.8023004661. The cubic root of 12643730 is about 232.9655680484.

It can be divided in two parts, 1264 and 3730, that added together give a palindrome (4994).

The spelling of 12643730 in words is "twelve million, six hundred forty-three thousand, seven hundred thirty".