12288515 has 4 divisors (see below), whose sum is σ = 14746224. Its totient is φ = 9830808.

The previous prime is 12288499. The next prime is 12288517. The reversal of 12288515 is 51588221.

It is a happy number.

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 12288515 - 2⁴ = 12288499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12288517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1228847 + ... + 1228856.

It is an arithmetic number, because the mean of its divisors is an integer number (3686556).

Almost surely, 2^12288515 is an apocalyptic number.

12288515 is a deficient number, since it is larger than the sum of its proper divisors (2457709).

12288515 is an equidigital number, since it uses as much as digits as its factorization.

12288515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2457708.

The product of its digits is 6400, while the sum is 32.

The square root of 12288515 is about 3505.4978248460. The cubic root of 12288515 is about 230.7631549825.

The spelling of 12288515 in words is "twelve million, two hundred eighty-eight thousand, five hundred fifteen".