12805135 has 16 divisors (see below), whose sum is σ = 18326016. Its totient is φ = 8398368.

The previous prime is 12805129. The next prime is 12805141. The reversal of 12805135 is 53150821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12805129) and next prime (12805141).

It is a cyclic number.

It is not a de Polignac number, because 12805135 - 2³ = 12805127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7149 + ... + 8758.

It is an arithmetic number, because the mean of its divisors is an integer number (1145376).

Almost surely, 2^12805135 is an apocalyptic number.

12805135 is a deficient number, since it is larger than the sum of its proper divisors (5520881).

12805135 is a wasteful number, since it uses less digits than its factorization.

12805135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15942.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 12805135 is about 3578.4263301066. The cubic root of 12805135 is about 233.9526957731.

Adding to 12805135 its reverse (53150821), we get a palindrome (65955956).

The spelling of 12805135 in words is "twelve million, eight hundred five thousand, one hundred thirty-five".