12390415 has 4 divisors (see below), whose sum is σ = 14868504. Its totient is φ = 9912328.

The previous prime is 12390403. The next prime is 12390419. The reversal of 12390415 is 51409321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12390415 - 2⁹ = 12389903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12390415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12390419) 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 3 ways as a sum of consecutive naturals, for example, 1239037 + ... + 1239046.

It is an arithmetic number, because the mean of its divisors is an integer number (3717126).

Almost surely, 2^12390415 is an apocalyptic number.

12390415 is a deficient number, since it is larger than the sum of its proper divisors (2478089).

12390415 is an equidigital number, since it uses as much as digits as its factorization.

12390415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2478088.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12390415 is about 3520.0021306812. The cubic root of 12390415 is about 231.3992520793.

Adding to 12390415 its reverse (51409321), we get a palindrome (63799736).

The spelling of 12390415 in words is "twelve million, three hundred ninety thousand, four hundred fifteen".