12720830 has 16 divisors (see below), whose sum is σ = 22943520. Its totient is φ = 5078112.

The previous prime is 12720793. The next prime is 12720839. The reversal of 12720830 is 3802721.

12720830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12720796 and 12720805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5831 + ... + 7709.

It is an arithmetic number, because the mean of its divisors is an integer number (1433970).

Almost surely, 2^12720830 is an apocalyptic number.

12720830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12720830 is a deficient number, since it is larger than the sum of its proper divisors (10222690).

12720830 is a wasteful number, since it uses less digits than its factorization.

12720830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2563.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 12720830 is about 3566.6272583493. The cubic root of 12720830 is about 233.4381411244.

The spelling of 12720830 in words is "twelve million, seven hundred twenty thousand, eight hundred thirty".