12720765 has 8 divisors (see below), whose sum is σ = 20353248. Its totient is φ = 6784400.

The previous prime is 12720751. The next prime is 12720767. The reversal of 12720765 is 56702721.

12720765 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12720765 - 2¹⁰ = 12719741 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12720767) 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, 424011 + ... + 424040.

It is an arithmetic number, because the mean of its divisors is an integer number (2544156).

Almost surely, 2^12720765 is an apocalyptic number.

12720765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12720765 is a deficient number, since it is larger than the sum of its proper divisors (7632483).

12720765 is an equidigital number, since it uses as much as digits as its factorization.

12720765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848059.

The product of its (nonzero) digits is 5880, while the sum is 30.

The square root of 12720765 is about 3566.6181460874. The cubic root of 12720765 is about 233.4377435218.

The spelling of 12720765 in words is "twelve million, seven hundred twenty thousand, seven hundred sixty-five".