12255891 has 8 divisors (see below), whose sum is σ = 16445904. Its totient is φ = 8118240.

The previous prime is 12255889. The next prime is 12255899. The reversal of 12255891 is 19855221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12255891 - 2¹ = 12255889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12255899) 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 7 ways as a sum of consecutive naturals, for example, 12540 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (2055738).

Almost surely, 2^12255891 is an apocalyptic number.

12255891 is a deficient number, since it is larger than the sum of its proper divisors (4190013).

12255891 is a wasteful number, since it uses less digits than its factorization.

12255891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26181.

The product of its digits is 7200, while the sum is 33.

The square root of 12255891 is about 3500.8414702754. The cubic root of 12255891 is about 230.5587611711.

The spelling of 12255891 in words is "twelve million, two hundred fifty-five thousand, eight hundred ninety-one".