12255405 has 8 divisors (see below), whose sum is σ = 19608672. Its totient is φ = 6536208.

The previous prime is 12255403. The next prime is 12255409. The reversal of 12255405 is 50455221.

It is a happy number.

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

It is not a de Polignac number, because 12255405 - 2¹ = 12255403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12255403) 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, 408499 + ... + 408528.

It is an arithmetic number, because the mean of its divisors is an integer number (2451084).

Almost surely, 2^12255405 is an apocalyptic number.

12255405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12255405 is a deficient number, since it is larger than the sum of its proper divisors (7353267).

12255405 is an equidigital number, since it uses as much as digits as its factorization.

12255405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 817035.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 12255405 is about 3500.7720577038. The cubic root of 12255405 is about 230.5557135744. Note that the first 3 decimals are identical.

The spelling of 12255405 in words is "twelve million, two hundred fifty-five thousand, four hundred five".