12765399 has 4 divisors (see below), whose sum is σ = 17020536. Its totient is φ = 8510264.

The previous prime is 12765383. The next prime is 12765413. The reversal of 12765399 is 99356721.

12765399 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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 12765399 - 2⁴ = 12765383 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12765399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12765349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2127564 + ... + 2127569.

It is an arithmetic number, because the mean of its divisors is an integer number (4255134).

Almost surely, 2^12765399 is an apocalyptic number.

12765399 is a deficient number, since it is larger than the sum of its proper divisors (4255137).

12765399 is an equidigital number, since it uses as much as digits as its factorization.

12765399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4255136.

The product of its digits is 102060, while the sum is 42.

The square root of 12765399 is about 3572.8698548926. The cubic root of 12765399 is about 233.7104498081.

The spelling of 12765399 in words is "twelve million, seven hundred sixty-five thousand, three hundred ninety-nine".