12399215 has 8 divisors (see below), whose sum is σ = 14899248. Its totient is φ = 9905920.

The previous prime is 12399199. The next prime is 12399251. The reversal of 12399215 is 51299321.

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

It is not a de Polignac number, because 12399215 - 2⁴ = 12399199 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, 4319 + ... + 6591.

It is an arithmetic number, because the mean of its divisors is an integer number (1862406).

Almost surely, 2^12399215 is an apocalyptic number.

12399215 is a deficient number, since it is larger than the sum of its proper divisors (2500033).

12399215 is a wasteful number, since it uses less digits than its factorization.

12399215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369.

The product of its digits is 4860, while the sum is 32.

The square root of 12399215 is about 3521.2519080577. The cubic root of 12399215 is about 231.4540210688.

The spelling of 12399215 in words is "twelve million, three hundred ninety-nine thousand, two hundred fifteen".