12281915 has 4 divisors (see below), whose sum is σ = 14738304. Its totient is φ = 9825528.

The previous prime is 12281909. The next prime is 12281947. The reversal of 12281915 is 51918221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12281915 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1228187 + ... + 1228196.

It is an arithmetic number, because the mean of its divisors is an integer number (3684576).

Almost surely, 2^12281915 is an apocalyptic number.

12281915 is a deficient number, since it is larger than the sum of its proper divisors (2456389).

12281915 is an equidigital number, since it uses as much as digits as its factorization.

12281915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2456388.

The product of its digits is 1440, while the sum is 29.

The square root of 12281915 is about 3504.5563199926. The cubic root of 12281915 is about 230.7218342975.

The spelling of 12281915 in words is "twelve million, two hundred eighty-one thousand, nine hundred fifteen".