12281730 has 16 divisors (see below), whose sum is σ = 29476224. Its totient is φ = 3275120.

The previous prime is 12281729. The next prime is 12281767. The reversal of 12281730 is 3718221.

It is a self number, because there is not a number n which added to its sum of digits gives 12281730.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 204666 + ... + 204725.

It is an arithmetic number, because the mean of its divisors is an integer number (1842264).

Almost surely, 2^12281730 is an apocalyptic number.

12281730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12281730 is an abundant number, since it is smaller than the sum of its proper divisors (17194494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12281730 is a wasteful number, since it uses less digits than its factorization.

12281730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409401.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 12281730 is about 3504.5299256819. The cubic root of 12281730 is about 230.7206758529.

Adding to 12281730 its reverse (3718221), we get a palindrome (15999951).

The spelling of 12281730 in words is "twelve million, two hundred eighty-one thousand, seven hundred thirty".