12731830 has 32 divisors (see below), whose sum is σ = 23721984. Its totient is φ = 4917216.

The previous prime is 12731813. The next prime is 12731833. The reversal of 12731830 is 3813721.

It is a junction number, because it is equal to n+sod(n) for n = 12731795 and 12731804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12731833) 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 15 ways as a sum of consecutive naturals, for example, 48279 + ... + 48541.

It is an arithmetic number, because the mean of its divisors is an integer number (741312).

Almost surely, 2^12731830 is an apocalyptic number.

12731830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12731830 is a deficient number, since it is larger than the sum of its proper divisors (10990154).

12731830 is a wasteful number, since it uses less digits than its factorization.

12731830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 12731830 is about 3568.1689982399. The cubic root of 12731830 is about 233.5054082172.

The spelling of 12731830 in words is "twelve million, seven hundred thirty-one thousand, eight hundred thirty".