12243515 has 4 divisors (see below), whose sum is σ = 14692224. Its totient is φ = 9794808.

The previous prime is 12243457. The next prime is 12243541. The reversal of 12243515 is 51534221.

12243515 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12243515 - 2¹⁰ = 12242491 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, 1224347 + ... + 1224356.

It is an arithmetic number, because the mean of its divisors is an integer number (3673056).

Almost surely, 2^12243515 is an apocalyptic number.

12243515 is a deficient number, since it is larger than the sum of its proper divisors (2448709).

12243515 is an equidigital number, since it uses as much as digits as its factorization.

12243515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2448708.

The product of its digits is 1200, while the sum is 23.

The square root of 12243515 is about 3499.0734487861. The cubic root of 12243515 is about 230.4811289473.

Adding to 12243515 its reverse (51534221), we get a palindrome (63777736).

The spelling of 12243515 in words is "twelve million, two hundred forty-three thousand, five hundred fifteen".