12149915 has 4 divisors (see below), whose sum is σ = 14579904. Its totient is φ = 9719928.

The previous prime is 12149881. The next prime is 12149933. The reversal of 12149915 is 51994121.

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 12149915 - 2¹⁰ = 12148891 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1214987 + ... + 1214996.

It is an arithmetic number, because the mean of its divisors is an integer number (3644976).

Almost surely, 2^12149915 is an apocalyptic number.

12149915 is a deficient number, since it is larger than the sum of its proper divisors (2429989).

12149915 is an equidigital number, since it uses as much as digits as its factorization.

12149915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2429988.

The product of its digits is 3240, while the sum is 32.

The square root of 12149915 is about 3485.6728188400. The cubic root of 12149915 is about 229.8922936156.

The spelling of 12149915 in words is "twelve million, one hundred forty-nine thousand, nine hundred fifteen".