12055215 has 16 divisors (see below), whose sum is σ = 20304000. Its totient is φ = 6090912.

The previous prime is 12055207. The next prime is 12055231. The reversal of 12055215 is 51255021.

It is not a de Polignac number, because 12055215 - 2³ = 12055207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12055191 and 12055200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20865 + ... + 21434.

It is an arithmetic number, because the mean of its divisors is an integer number (1269000).

Almost surely, 2^12055215 is an apocalyptic number.

12055215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12055215 is a deficient number, since it is larger than the sum of its proper divisors (8248785).

12055215 is a wasteful number, since it uses less digits than its factorization.

12055215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42326.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 12055215 is about 3472.0620674176. The cubic root of 12055215 is about 229.2934524144.

The spelling of 12055215 in words is "twelve million, fifty-five thousand, two hundred fifteen".