13863145 has 4 divisors (see below), whose sum is σ = 16635780. Its totient is φ = 11090512.

The previous prime is 13863139. The next prime is 13863149. The reversal of 13863145 is 54136831.

13863145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1731856 + 12131289 = 1316^2 + 3483^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13863145 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13863149) 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, 1386310 + ... + 1386319.

It is an arithmetic number, because the mean of its divisors is an integer number (4158945).

Almost surely, 2^13863145 is an apocalyptic number.

It is an amenable number.

13863145 is a deficient number, since it is larger than the sum of its proper divisors (2772635).

13863145 is an equidigital number, since it uses as much as digits as its factorization.

13863145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772634.

The product of its digits is 8640, while the sum is 31.

The square root of 13863145 is about 3723.3244553759. The cubic root of 13863145 is about 240.2263200778.

Adding to 13863145 its reverse (54136831), we get a palindrome (67999976).

The spelling of 13863145 in words is "thirteen million, eight hundred sixty-three thousand, one hundred forty-five".