12351215 has 4 divisors (see below), whose sum is σ = 14821464. Its totient is φ = 9880968.

The previous prime is 12351203. The next prime is 12351217. The reversal of 12351215 is 51215321.

It is a happy number.

12351215 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51215321 = 97 ⋅527993.

It is a cyclic number.

It is not a de Polignac number, because 12351215 - 2²⁰ = 11302639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12351217) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1235117 + ... + 1235126.

It is an arithmetic number, because the mean of its divisors is an integer number (3705366).

Almost surely, 2^12351215 is an apocalyptic number.

12351215 is a deficient number, since it is larger than the sum of its proper divisors (2470249).

12351215 is an equidigital number, since it uses as much as digits as its factorization.

12351215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2470248.

The product of its digits is 300, while the sum is 20.

The square root of 12351215 is about 3514.4295411916. The cubic root of 12351215 is about 231.1549655763.

Adding to 12351215 its reverse (51215321), we get a palindrome (63566536).

The spelling of 12351215 in words is "twelve million, three hundred fifty-one thousand, two hundred fifteen".