12855805 has 8 divisors (see below), whose sum is σ = 15688800. Its totient is φ = 10110096.

The previous prime is 12855797. The next prime is 12855809. The reversal of 12855805 is 50855821.

It is a happy number.

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 12855805 - 2³ = 12855797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12855809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21495 + ... + 22084.

It is an arithmetic number, because the mean of its divisors is an integer number (1961100).

Almost surely, 2^12855805 is an apocalyptic number.

It is an amenable number.

12855805 is a deficient number, since it is larger than the sum of its proper divisors (2832995).

12855805 is an equidigital number, since it uses as much as digits as its factorization.

12855805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43643.

The product of its (nonzero) digits is 16000, while the sum is 34.

The square root of 12855805 is about 3585.4992678845. The cubic root of 12855805 is about 234.2608737402.

The spelling of 12855805 in words is "twelve million, eight hundred fifty-five thousand, eight hundred five".