12720365 has 8 divisors (see below), whose sum is σ = 17445120. Its totient is φ = 8722512.

The previous prime is 12720361. The next prime is 12720427. The reversal of 12720365 is 56302721.

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

It is a cyclic number.

It is not a de Polignac number, because 12720365 - 2² = 12720361 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 (12720361) 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 7 ways as a sum of consecutive naturals, for example, 181685 + ... + 181754.

It is an arithmetic number, because the mean of its divisors is an integer number (2180640).

Almost surely, 2^12720365 is an apocalyptic number.

It is an amenable number.

12720365 is a deficient number, since it is larger than the sum of its proper divisors (4724755).

12720365 is an equidigital number, since it uses as much as digits as its factorization.

12720365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363451.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 12720365 is about 3566.5620701174. The cubic root of 12720365 is about 233.4352967068.

The spelling of 12720365 in words is "twelve million, seven hundred twenty thousand, three hundred sixty-five".