12355215 has 16 divisors (see below), whose sum is σ = 19840128. Its totient is φ = 6565536.

The previous prime is 12355199. The next prime is 12355223. The reversal of 12355215 is 51255321.

It is a happy number.

12355215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12355215 - 2⁴ = 12355199 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3264 + ... + 5946.

It is an arithmetic number, because the mean of its divisors is an integer number (1240008).

Almost surely, 2^12355215 is an apocalyptic number.

12355215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12355215 is a deficient number, since it is larger than the sum of its proper divisors (7484913).

12355215 is a wasteful number, since it uses less digits than its factorization.

12355215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998.

The product of its digits is 1500, while the sum is 24.

The square root of 12355215 is about 3514.9985775246. The cubic root of 12355215 is about 231.1799164297.

The spelling of 12355215 in words is "twelve million, three hundred fifty-five thousand, two hundred fifteen".