12155215 has 8 divisors (see below), whose sum is σ = 14609520. Its totient is φ = 9708672.

The previous prime is 12155191. The next prime is 12155237. The reversal of 12155215 is 51255121.

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 12155215 - 2⁵ = 12155183 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2391 + ... + 5479.

It is an arithmetic number, because the mean of its divisors is an integer number (1826190).

Almost surely, 2^12155215 is an apocalyptic number.

12155215 is a deficient number, since it is larger than the sum of its proper divisors (2454305).

12155215 is an equidigital number, since it uses as much as digits as its factorization.

12155215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3881.

The product of its digits is 500, while the sum is 22.

The square root of 12155215 is about 3486.4329908948. The cubic root of 12155215 is about 229.9257164017.

The spelling of 12155215 in words is "twelve million, one hundred fifty-five thousand, two hundred fifteen".