13185427 has 4 divisors (see below), whose sum is σ = 13466016. Its totient is φ = 12904840.

The previous prime is 13185413. The next prime is 13185443. The reversal of 13185427 is 72458131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13185427 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13185127) 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 3 ways as a sum of consecutive naturals, for example, 140224 + ... + 140317.

It is an arithmetic number, because the mean of its divisors is an integer number (3366504).

Almost surely, 2^13185427 is an apocalyptic number.

13185427 is a deficient number, since it is larger than the sum of its proper divisors (280589).

13185427 is an equidigital number, since it uses as much as digits as its factorization.

13185427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280588.

The product of its digits is 6720, while the sum is 31.

The square root of 13185427 is about 3631.1743279551. The cubic root of 13185427 is about 236.2461462750.

It can be divided in two parts, 131 and 85427, that added together give a palindrome (85558).

The spelling of 13185427 in words is "thirteen million, one hundred eighty-five thousand, four hundred twenty-seven".