12390815 has 8 divisors (see below), whose sum is σ = 15231888. Its totient is φ = 9670720.

The previous prime is 12390803. The next prime is 12390823. The reversal of 12390815 is 51809321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12390815 - 2⁴ = 12390799 is a prime.

It is a Duffinian number.

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, 30017 + ... + 30426.

It is an arithmetic number, because the mean of its divisors is an integer number (1903986).

Almost surely, 2^12390815 is an apocalyptic number.

12390815 is a deficient number, since it is larger than the sum of its proper divisors (2841073).

12390815 is an equidigital number, since it uses as much as digits as its factorization.

12390815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60489.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 12390815 is about 3520.0589483700. The cubic root of 12390815 is about 231.4017421413.

The spelling of 12390815 in words is "twelve million, three hundred ninety thousand, eight hundred fifteen".