12720935 has 4 divisors (see below), whose sum is σ = 15265128. Its totient is φ = 10176744.

The previous prime is 12720889. The next prime is 12720941. The reversal of 12720935 is 53902721.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12720935 - 2¹⁴ = 12704551 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12720898 and 12720907.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1272089 + ... + 1272098.

It is an arithmetic number, because the mean of its divisors is an integer number (3816282).

Almost surely, 2^12720935 is an apocalyptic number.

12720935 is a deficient number, since it is larger than the sum of its proper divisors (2544193).

12720935 is an equidigital number, since it uses as much as digits as its factorization.

12720935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2544192.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 12720935 is about 3566.6419781077. The cubic root of 12720935 is about 233.4387834027.

The spelling of 12720935 in words is "twelve million, seven hundred twenty thousand, nine hundred thirty-five".