12801565 has 8 divisors (see below), whose sum is σ = 17556480. Its totient is φ = 8778192.

The previous prime is 12801563. The next prime is 12801571. The reversal of 12801565 is 56510821.

12801565 is digitally balanced in base 2, because in such base 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 a cyclic number.

It is not a de Polignac number, because 12801565 - 2¹ = 12801563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12801563) 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, 182845 + ... + 182914.

It is an arithmetic number, because the mean of its divisors is an integer number (2194560).

Almost surely, 2^12801565 is an apocalyptic number.

It is an amenable number.

12801565 is a deficient number, since it is larger than the sum of its proper divisors (4754915).

12801565 is an equidigital number, since it uses as much as digits as its factorization.

12801565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365771.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 12801565 is about 3577.9274727138. The cubic root of 12801565 is about 233.9309521847.

It can be divided in two parts, 12801 and 565, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 12801565 in words is "twelve million, eight hundred one thousand, five hundred sixty-five".