12405243 has 8 divisors (see below), whose sum is σ = 17110800. Its totient is φ = 7984928.

The previous prime is 12405221. The next prime is 12405269. The reversal of 12405243 is 34250421.

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

It is a cyclic number.

It is not a de Polignac number, because 12405243 - 2¹³ = 12397051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12405343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71208 + ... + 71381.

It is an arithmetic number, because the mean of its divisors is an integer number (2138850).

Almost surely, 2^12405243 is an apocalyptic number.

12405243 is a deficient number, since it is larger than the sum of its proper divisors (4705557).

12405243 is a wasteful number, since it uses less digits than its factorization.

12405243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142621.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 12405243 is about 3522.1077496295. The cubic root of 12405243 is about 231.4915228731.

Adding to 12405243 its reverse (34250421), we get a palindrome (46655664).

The spelling of 12405243 in words is "twelve million, four hundred five thousand, two hundred forty-three".